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Sprint-2 Mandatory-implement,interpret and stretch-extend are done.
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‎Sprint-2/1-key-errors/0.js‎

Lines changed: 18 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -1,18 +1,18 @@
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because inside the function we create a variable called str again.
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// call the function capitalise with a string input
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// interpret the error message and figure out why an error is occurring
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function capitalise(str) {
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let str = `${str[0].toUpperCase()}${str.slice(1)}`;
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return str;
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}
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// =============> write your explanation here
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// The error occurs because we are trying to declare a variable named str inside the function, but it is already declared as a parameter. This creates a conflict and results in a syntax error.
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// =============> write your new code here
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function capitalise(str) {
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return `${str[0].toUpperCase()}${str.slice(1)}`;
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}
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because inside the function we create a variable called str again.
4+
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// call the function capitalise with a string input
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// interpret the error message and figure out why an error is occurring
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function capitalise(str) {
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let str = `${str[0].toUpperCase()}${str.slice(1)}`;
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return str;
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}
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// =============> write your explanation here
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// The error occurs because we are trying to declare a variable named str inside the function, but it is already declared as a parameter. This creates a conflict and results in a syntax error.
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// =============> write your new code here
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function capitalise(str) {
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return `${str[0].toUpperCase()}${str.slice(1)}`;
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}

‎Sprint-2/1-key-errors/1.js‎

Lines changed: 29 additions & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -1,29 +1,29 @@
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// Predict and explain first...
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// Why will an error occur when this program runs?
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// =============> write your prediction here
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// console.log(decimalNumber); will cause error because decimalNumber only exists inside the function.
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// Try playing computer with the example to work out what is going on
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function convertToPercentage(decimalNumber) {
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const decimalNumber = 0.5;
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const percentage = `${decimalNumber * 100}%`;
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return percentage;
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}
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console.log(decimalNumber);
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// =============> write your explanation here
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//The error happens because the function already has a parameter called decimalNumber.
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//Creating another variable with the same name inside the function causes a conflict.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function convertToPercentage(decimalNumber) {
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const percentage = `${decimalNumber * 100}%`;
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return percentage;
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}
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console.log(convertToPercentage(0.5));
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// Predict and explain first...
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// Why will an error occur when this program runs?
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// =============> write your prediction here
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// console.log(decimalNumber); will cause error because decimalNumber only exists inside the function.
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// Try playing computer with the example to work out what is going on
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function convertToPercentage(decimalNumber) {
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const decimalNumber = 0.5;
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const percentage = `${decimalNumber * 100}%`;
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return percentage;
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}
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console.log(decimalNumber);
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// =============> write your explanation here
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//The error happens because the function already has a parameter called decimalNumber.
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//Creating another variable with the same name inside the function causes a conflict.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function convertToPercentage(decimalNumber) {
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const percentage = `${decimalNumber * 100}%`;
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return percentage;
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}
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console.log(convertToPercentage(0.5));

‎Sprint-2/1-key-errors/2.js‎

Lines changed: 28 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -1,28 +1,28 @@
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// Predict and explain first BEFORE you run any code...
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// this function should square any number but instead we're going to get an error
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// =============> write your prediction of the error here
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// it is syntax error. 3 is a value not a variable name.
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function square(3) {
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return num * num;
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}
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// =============> write the error message here
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//function square(3) {
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^
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//SyntaxError: Unexpected number
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// =============> explain this error message here
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//The error is as I predicted. The function parameter should be a variable name, not a value.
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//In this case, 3 is a value and cannot be used as a parameter name.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function square(num) {
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return num * num;
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}
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// Predict and explain first BEFORE you run any code...
3+
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// this function should square any number but instead we're going to get an error
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// =============> write your prediction of the error here
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// it is syntax error. 3 is a value not a variable name.
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function square(3) {
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return num * num;
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}
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// =============> write the error message here
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//function square(3) {
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^
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//SyntaxError: Unexpected number
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// =============> explain this error message here
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//The error is as I predicted. The function parameter should be a variable name, not a value.
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//In this case, 3 is a value and cannot be used as a parameter name.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function square(num) {
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return num * num;
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}

‎Sprint-2/2-mandatory-debug/0.js‎

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@@ -1,21 +1,21 @@
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because the multiply function does not return a value.
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function multiply(a, b) {
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console.log(a * b);
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}
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console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
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// =============> write your explanation here
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//The function multiply(a, b) logs the result but does not return anything.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function multiply(a, b) {
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return a * b;
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}
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console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because the multiply function does not return a value.
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function multiply(a, b) {
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console.log(a * b);
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}
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console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
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// =============> write your explanation here
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//The function multiply(a, b) logs the result but does not return anything.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function multiply(a, b) {
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return a * b;
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}
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console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

‎Sprint-2/2-mandatory-debug/1.js‎

Lines changed: 21 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -1,21 +1,21 @@
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because the sum function does not return a value.
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function sum(a, b) {
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return;
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a + b;
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}
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console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
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// =============> write your explanation here
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// The function sum(a, b) has a return statement that does not return the result of a + b.
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// Instead, it returns undefined because the return statement is followed by a semicolon, which ends the statement before the addition operation is executed.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function sum(a, b) {
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return a + b;
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}
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console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
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// Predict and explain first...
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// =============> write your prediction here
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// I predict the code will give an error because the sum function does not return a value.
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function sum(a, b) {
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return;
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a + b;
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}
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console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
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// =============> write your explanation here
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// The function sum(a, b) has a return statement that does not return the result of a + b.
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// Instead, it returns undefined because the return statement is followed by a semicolon, which ends the statement before the addition operation is executed.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function sum(a, b) {
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return a + b;
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}
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console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

‎Sprint-2/2-mandatory-debug/2.js‎

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@@ -1,34 +1,34 @@
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// Predict and explain first...
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// Predict the output of the following code:
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// =============> Write your prediction here
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//The function has no parameter, so it cannot use input values like 42, 105, 806.
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const num = 103;
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function getLastDigit() {
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return num.toString().slice(-1);
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}
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console.log(`The last digit of 42 is ${getLastDigit(42)}`);
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console.log(`The last digit of 105 is ${getLastDigit(105)}`);
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console.log(`The last digit of 806 is ${getLastDigit(806)}`);
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// Now run the code and compare the output to your prediction
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// =============> write the output here
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// Explain why the output is the way it is
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// =============> write your explanation here
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//The function is not using the value passed into it.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function getLastDigit(num) {
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return num.toString().slice(-1);
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}
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console.log(`The last digit of 42 is ${getLastDigit(42)}`);
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console.log(`The last digit of 105 is ${getLastDigit(105)}`);
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console.log(`The last digit of 806 is ${getLastDigit(806)}`);
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// This program should tell the user the last digit of each number.
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// Explain why getLastDigit is not working properly - correct the problem
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// If a function should work with different values → it must have parameters.
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// Otherwise it will always use the same fixed value
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// Predict and explain first...
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3+
// Predict the output of the following code:
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// =============> Write your prediction here
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//The function has no parameter, so it cannot use input values like 42, 105, 806.
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const num = 103;
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function getLastDigit() {
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return num.toString().slice(-1);
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}
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console.log(`The last digit of 42 is ${getLastDigit(42)}`);
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console.log(`The last digit of 105 is ${getLastDigit(105)}`);
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console.log(`The last digit of 806 is ${getLastDigit(806)}`);
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// Now run the code and compare the output to your prediction
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// =============> write the output here
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// Explain why the output is the way it is
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// =============> write your explanation here
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//The function is not using the value passed into it.
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// Finally, correct the code to fix the problem
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// =============> write your new code here
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function getLastDigit(num) {
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return num.toString().slice(-1);
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}
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console.log(`The last digit of 42 is ${getLastDigit(42)}`);
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console.log(`The last digit of 105 is ${getLastDigit(105)}`);
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console.log(`The last digit of 806 is ${getLastDigit(806)}`);
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// This program should tell the user the last digit of each number.
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// Explain why getLastDigit is not working properly - correct the problem
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// If a function should work with different values → it must have parameters.
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// Otherwise it will always use the same fixed value

‎Sprint-2/3-mandatory-implement/1-bmi.js‎

Lines changed: 23 additions & 23 deletions
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@@ -1,23 +1,23 @@
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// Below are the steps for how BMI is calculated
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// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m) squared.
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// For example, if you weigh 70kg (around 11 stone) and are 1.73m (around 5 feet 8 inches) tall, you work out your BMI by:
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// squaring your height: 1.73 x 1.73 = 2.99
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// dividing 70 by 2.99 = 23.41
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// Your result will be displayed to 1 decimal place, for example 23.4.
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// You will need to implement a function that calculates the BMI of someone based off their weight and height
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// Given someone's weight in kg and height in metres
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// Then when we call this function with the weight and height
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// It should return their Body Mass Index to 1 decimal place
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function calculateBMI(weight, height) {
18-
// return the BMI of someone based off their weight and height
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const bmi = weight / (height * height);
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return Number(bmi.toFixed(1));
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}
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console.log(calculateBMI(72, 1.76));
23-
// just to check the function is working correctly, and it works.
1+
// Below are the steps for how BMI is calculated
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// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m) squared.
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// For example, if you weigh 70kg (around 11 stone) and are 1.73m (around 5 feet 8 inches) tall, you work out your BMI by:
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// squaring your height: 1.73 x 1.73 = 2.99
8+
// dividing 70 by 2.99 = 23.41
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// Your result will be displayed to 1 decimal place, for example 23.4.
10+
11+
// You will need to implement a function that calculates the BMI of someone based off their weight and height
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// Given someone's weight in kg and height in metres
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// Then when we call this function with the weight and height
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// It should return their Body Mass Index to 1 decimal place
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function calculateBMI(weight, height) {
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// return the BMI of someone based off their weight and height
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const bmi = weight / (height * height);
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return Number(bmi.toFixed(1));
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}
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console.log(calculateBMI(72, 1.76));
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// just to check the function is working correctly, and it works.

‎Sprint-2/3-mandatory-implement/2-cases.js‎

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// A set of words can be grouped together in different cases.
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// For example, "hello there" in snake case would be written "hello_there"
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// UPPER_SNAKE_CASE means taking a string and writing it in all caps with underscores instead of spaces.
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// Implement a function that:
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// Given a string input like "hello there"
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// When we call this function with the input string
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// it returns the string in UPPER_SNAKE_CASE, so "HELLO_THERE"
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// Another example: "lord of the rings" should be "LORD_OF_THE_RINGS"
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// You will need to come up with an appropriate name for the function
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// Use the MDN string documentation to help you find a solution
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// This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
17-
function toUpperSnakeCase(str) {
18-
return str.toUpperCase().replaceAll(" ", "_");
19-
}
20-
console.log(toUpperSnakeCase("hello there"));
21-
console.log(toUpperSnakeCase("lord of the rings"));
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// A set of words can be grouped together in different cases.
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3+
// For example, "hello there" in snake case would be written "hello_there"
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// UPPER_SNAKE_CASE means taking a string and writing it in all caps with underscores instead of spaces.
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// Implement a function that:
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// Given a string input like "hello there"
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// When we call this function with the input string
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// it returns the string in UPPER_SNAKE_CASE, so "HELLO_THERE"
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12+
// Another example: "lord of the rings" should be "LORD_OF_THE_RINGS"
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// You will need to come up with an appropriate name for the function
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// Use the MDN string documentation to help you find a solution
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// This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
17+
function toUpperSnakeCase(str) {
18+
return str.toUpperCase().replaceAll(" ", "_");
19+
}
20+
console.log(toUpperSnakeCase("hello there"));
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console.log(toUpperSnakeCase("lord of the rings"));

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