new coursework sprint 1

Author: risikatpopoola

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,4 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+// In Line 3, count is a variable, and the = is an assignment operator that stores the result of the operation(Addition)

Sprint-1/1-key-exercises/2-initials.js

@@ -1,11 +1,8 @@
-let firstName = "Creola";
-let middleName = "Katherine";
-let lastName = "Johnson";
-
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
 let initials = ``;
+let initials = firstName.charAt(0)+ middleName.charAt(0) + lastName.charAt(0);
+console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
-

Sprint-1/1-key-exercises/3-paths.js

@@ -20,4 +20,8 @@ console.log(`The base part of ${filePath} is ${base}`);
 const dir = ;
 const ext = ;
 
+const dir =filePath.slice(0, filePath.lastIndexOf("/")+1);
+const ext =filePath.slice(filePath.indexOf(".")+1);
+console.log(dir)
+console.log(ext)
 // https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -1,9 +1,12 @@
-const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+console.log(num)
 
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+//The math.Floor method rounds a number to the nearest integer, so using bodmas, 
+//the expressions are evaluated, the minimum which equals 1 is added to 1 then subtracted from maximum(100), after which it is multiplied by 
+//a random number between 0-1 exclusive and then rounded down to the nearest integer after which the minimum is added. The values produced ranges from 0-100

Sprint-1/2-mandatory-errors/0.js

@@ -1,2 +1,2 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
+//This is just an instruction for the first activity - but it is just for human consumption
+//We don't want the computer to run these 2 lines - how can we solve this problem?

Sprint-1/2-mandatory-errors/1.js

@@ -1,4 +1,5 @@
 // trying to create an age variable and then reassign the value by 1
 
 const age = 33;
-age = age + 1;
+let age = 33;
+age = age + 1;

Sprint-1/2-mandatory-errors/2.js

@@ -2,4 +2,6 @@
 // what's the error ?
 
 console.log(`I was born in ${cityOfBirth}`);
+// what's the error ? You cannot access a variable before initialization.
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);

Sprint-1/2-mandatory-errors/3.js

@@ -1,9 +1,10 @@
 const cardNumber = 4533787178994213;
+const cardNumber = '4533787178994213';
 const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
-// However, the code isn't working
-// Before running the code, make and explain a prediction about why the code won't work
+const last4Digits = cardNumber.slice(-4);
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+//It didn't work because the method only works for strings so to make it work the card number should be saved as a string.

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,2 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
+const TwelveHourClockTime = "8:53pm";
+const TwentyFourHourClockTime = "20:53";

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -3,20 +3,27 @@ let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
 priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+carPrice = Number(carPrice.replaceAll(",",""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",",""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
-
 console.log(`The percentage change is ${percentageChange}`);
-
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
+//The function call are made five times
+//line  4, 5, 10
+
 
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
 
+// Line 5, it was missing a comma between the characters that are to be replaced so to fix the problem, include a comma
+
 // c) Identify all the lines that are variable reassignment statements
+//Lines 7 & 8
 
 // d) Identify all the lines that are variable declarations
-
+//Lines 1 & 2
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+//This expression replaces every instance of "," with "".