London | May 2025 | Samuel Tarawally | Sprint 1 | Coursework #660
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| // Line 3 reassigns the 'count' variable. | ||
| // It evaluates the right side first (0 + 1 = 1), and then assigns that result back to the 'count' variable. | ||
| // The 'count' variable is often used to keep track of the number of iterations or occurrences in a loop or process. |
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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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| console.log(`The random number is: ${num}`); |
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Can you describe how the expression at line 4 works?
Can you also describe the possible values that could be assigned to num using the interval notation ?
[,]=> inclusion(,)=> exclusion
For example, we can say, "Math.random()returns a random number in the interval[0, 1)".
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| // 5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"); | ||
| // This line extracts and formats the pence part of the price. | ||
| // - It declares a constant variable named `pence`. | ||
| // - It uses `substring(paddedPenceNumberString.length - 2)` on `paddedPenceNumberString` ("399"). | ||
| // - This extracts the last two characters of the string, which are "99". | ||
| // - The `padEnd(2, "0")` method ensures the extracted pence value has at least two digits. |
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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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