London | 26-ITP-May | Dipa Sarker | Sprint 1 | Coursework by Dipa-Sarker · Pull Request #1419 · CodeYourFuture/Module-Structuring-and-Testing-Data

Dipa-Sarker · 2026-06-28T10:41:20Z

Learners, PR Template

Self checklist

I have titled my PR with Region | Cohort | FirstName LastName | Sprint | Assignment Title
My changes meet the requirements of the task
I have tested my changes
My changes follow the style guide

Changelist

Completed all Exercises tasks.
Ran and explained the errors in the Errors section.
Interpreted the programs in the Interpret section.
Completed the Explore (Stretch) activity.
Tested the solutions locally before committing and pushing the changes.

Joshuafolorunsho · 2026-07-01T19:20:30Z

+// num stores the result of the expression after calculating it.
 // 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
+// There is a range of numbers from 1 to 100. In the expression, 
+// (maximum - minimum + 1) calculates the size of the possible integers, which is 100. 
+// The Math.random() function generates a random decimal number in the range 0 ≤ x < 1.
+// This random decimal is then multiplied by the range size to scale it to a
+// value between 0 and 100. The result is a floating-point number in this interval.
+// Next, Math.floor() is used to round the number down to the largest integer less than
+// or equal to the calculated value, producing an integer between 0 and 99.
+// Finally, by adding minimum, the range is shifted from 0–99 to 1–100, giving a random
+// integer within the required range.
+// I have run 5 times the program and this produces different values each time because
+// Math.random() generates a new random decimal number every time. 
+// Since the final value of num depends on this function, the result changes on each execution.


I really like how you have explained this.
Good job!

Joshuafolorunsho · 2026-07-01T19:34:30Z

+
+// We can solve this problem by writing those two lines as comments using //, 
+// because JavaScript ignores commented lines and they will not be executed by the computer.


This is correct, but doesn't quite solve the problem. If we were to run this file as it is, what will happen? Will the code compile?

Joshuafolorunsho · 2026-07-01T19:44:50Z

+// There is a constant variable age, which is fixed and it's value cannot be reassigned.
+// If we want to change the value of age, we have to use let instead of const.


Your explanation is correct, however If we were to run the code as it is, will the code compile successfully?

Joshuafolorunsho · 2026-07-01T19:46:03Z

+// The variable const cityOfBirth = "Bolton"; needs to be declared at first. 
+// As it is not declared, JavaScript cannot find out the variable cityofBirth in console.log.


Another great explanation, however we need to actually fix the problem.

Joshuafolorunsho · 2026-07-01T19:51:42Z

 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+console.log(cardNumber.toString());
+const cardNumber1 = cardNumber.toString()
+const last4Digits = cardNumber1.slice(-4); 
+console.log(last4Digits);


Really clever solution, I really like it!
Do you think we can find a better variable name for cardNumber1?

Joshuafolorunsho · 2026-07-01T20:23:15Z


 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+// The expression movieLength % 60 devides the movieLength by 60 seconds and return the reminder 


A small typo here: devides

Joshuafolorunsho · 2026-07-01T20:26:11Z

+// The variable result reprents the movieLength in hours:minutes:seconds. The variable should be renamed by totalDuration.

 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// I have tried with 3 variables, 1515, 9999 & 70052. I observed that this code works succesfully with all the values


Curious to see if a negative number will work.
What do you think?

Joshuafolorunsho · 2026-07-01T20:27:02Z

 invoke the function `alert` with an input string of `"Hello world!"`;

 What effect does calling the `alert` function have?
+// `alert` function deisplays a popup dialogue box with a message and the user have to click 'ok' button. 


one small typo here: deisplays

Joshuafolorunsho · 2026-07-01T20:59:50Z

+// There are 4 variable declarations lines. 
+// let carPrice = "10,000";
+// let priceAfterOneYear = "8,543";


Could you please highlight the lines where the declarations are?
I.e line 1,10, 20.

Joshuafolorunsho · 2026-07-01T21:02:34Z

+// const priceDifference = carPrice - priceAfterOneYear;
+// const percentageChange = (priceDifference / carPrice) * 100;


Not quite. These lines are declarations, not reassignments. Have another look at what makes a statement a reassignment.

Dipa-Sarker added 14 commits June 27, 2026 16:04

add explanation for line 3

9cfc4d2

add printing option to see output

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create variables for dir and ext

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run the program several times to observe the results

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add solution

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fixed error in the problem

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fixed the error in the problem

d26014e

add answers

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fix errors

c267bf0

add answers to the questions

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add answers for the questions

f5499b3

check code by running

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add answers with explanations

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add answers and explanations

2cb9c3a

Dipa-Sarker added the Needs Review Trainee to add when requesting review. PRs without this label will not be reviewed. label Jun 28, 2026