Sheffield | 26-ITP-jan | Richard Frimpong | Sprint 1 | Structuring and Testing Data#1073
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Richiealx wants to merge 17 commits intoCodeYourFuture:mainfrom
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Sheffield | 26-ITP-jan | Richard Frimpong | Sprint 1 | Structuring and Testing Data#1073Richiealx wants to merge 17 commits intoCodeYourFuture:mainfrom
Richiealx wants to merge 17 commits intoCodeYourFuture:mainfrom
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Very clear explanation and answers! I just have two follow-up questions.
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| // Line 3 takes the current value of count (0), adds 1 to it, | ||
| // and assigns the result (1) back to the count variable using =. No newline at end of file |
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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?
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| 5) `const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");` | ||
| - First, `substring(length - 2)` takes the last 2 digits. | ||
| - Then `padEnd(2, "0")` ensures it’s at least 2 characters (adds zeros on the right if needed). | ||
| - Purpose: get exactly two pence digits. | ||
| - For `"399"`, last two digits are `"99"` → stays `"99"`. |
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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?
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Thanks for the feedback @cjyuan!
Answers to follow-up questions
Programming term for
count = count + 1The one-word programming term is increment.
The statement increases the value stored in the variable by 1 and assigns the updated value back to the same variable.
This pattern is very common and can also be written using shorthand operators such as
count += 1;orcount++;.Is
.padEnd(2, "0")necessary?Yes,
.padEnd(2, "0")is needed to handle cases where the pence value has fewer than two digits.For example:
penceString = "5p", removing"p"gives"5"substring(length - 2)would return"5"(only one digit)Without
.padEnd(2, "0"), the output would be£0.5.With
.padEnd(2, "0"), it becomes£0.50.So
.padEndensures the pence part always contains exactly two digits, which is required for correct currency formatting.