London | Jan2026 | Ihor Taradaiko | Sprint 1 | Coursework/sprint 1 by ihortar · Pull Request #934 · CodeYourFuture/Module-Structuring-and-Testing-Data

ihortar · 2026-02-07T14:53:30Z

- 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 the following exercises:

Key Exercises
Mandatory Errors
Mandatory Interpret

cjyuan · 2026-02-16T16:23:30Z

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

 // 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
+//It takes the current value of count, add 1 to it


Operation like count = count + 1 is very common in programming, and there is a programming term describing such operation.

Can you find out what one-word programming term describes the operation on line 3?

cjyuan · 2026-02-16T16:35:01Z

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

 // 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 = `${firstName.charAt()}${middleName.charAt()}${lastName.charAt()} `;


Normally, we specify an argument in the function call .charAt() to indicate the position of the character to return. For example, firstName.charAt(0) to extract the first character.

Can you find out why the statement on line 8 can still work?

We don't recommend this practice. Can you update the code on line 8 to explicitly pass an argument to each function .charAt() to extract the first character?

cjyuan · 2026-02-16T16:48:25Z

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

 // 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
+//results: 4,23,91,46 the program is giving you a random number while math.random give you a random decimal number math.floor rounds the total number up


Can you give a precise description what each of these expressions does, and the range of the numbers it may produce?

Math.random()

Math.random() * (maximum - minimum + 1)

Math.floor(Math.random() * (maximum - minimum + 1))

Math.floor(Math.random() * (maximum - minimum + 1)) + minimum

Note: To describe a range of numbers, we can use the concise and precise interval notation:

[, ] => inclusion

(, ) => exclusion

For example, [1, 10) means, all numbers between 1 and 10, including 1 but excluding 10.

cjyuan · 2026-02-16T16:51:05Z

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

+const HourClockTime24 = "20:53";
+const hourClockTime12 = "08:53";


In JS naming convention, variable names usually begins with a lowercase letter. Names starting with an uppercase letter are used for built-in and custom data types (e.g., Math)

cjyuan · 2026-02-16T16:51:48Z

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


 // a) How many function calls are there in this file? Write down all the lines where a function call is made
-
+//4,5,11


Can you also indicate the total number of function calls? (It is not three).

cjyuan · 2026-02-16T16:54:55Z

Sprint-1/3-mandatory-interpret/2-time-format.js

 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+//math expression


The question means to ask, "what does (movieLength - remainingSeconds) / 60 calculate?"

cjyuan · 2026-02-16T17:01:54Z

Sprint-1/3-mandatory-interpret/2-time-format.js

-
+//maybe timeLeft or similar


When I see a variable named timeLeft, I may think

It represents a remaining time.

Is looks like it is storing a number.

What is the unit of the time? Is it in hours or seconds?

Can you think of a more meaningful name that could more accurately describe the value it stores.

cjyuan · 2026-02-16T17:03:08Z

Sprint-1/3-mandatory-interpret/3-to-pounds.js

 const pence = paddedPenceNumberString
  .substring(paddedPenceNumberString.length - 2)
  .padEnd(2, "0");
-
+//5. takes the last 2 digits as the pence from paddedPenceNumberString


Could we expect this program to work as intended for any valid penceString if we deleted .padEnd(2, "0") from the code?
In other words, do we really need .padEnd(2, "0") in this script?

cjyuan · 2026-02-16T17:06:29Z

Sprint-1/4-stretch-explore/chrome.md

-What is the return value of `prompt`?
+//shows a pop-up to enter a name / stores and shows name
+What effect does calling the `prompt` function have? //shows pop-up form
+What is the return value of `prompt`? //if myName is set returns myName value


Can you describe the return value of prompt() as I am someone who has never used the function before?

The current description does not quite tell me exactly what the function returns.

ihortar added 12 commits February 7, 2026 11:33

Key 1-count done

c16be64

2-initials done

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3-paths done

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4-random done

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0 done

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1 done

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error 2 done

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error 3 done

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1-interpret done

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2-interpret done

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3-interpret done

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stretch-explore done

2727395

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		const HourClockTime24 = "20:53";
		const hourClockTime12 = "08:53";


		// a) How many function calls are there in this file? Write down all the lines where a function call is made

		//4,5,11

		// d) Interpret line 4, what does the expression assigned to totalMinutes mean?

		//math expression

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ihortar commented Feb 7, 2026 •

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