The given code contains a `for` loop that calculates the...

September 4, 2025 at 04:36 PM

(This is from Review Exercise R4.15 at the end of Chapter 4 of Java for Everyone.) Rewrite the following for loop into a while loop. int s = 0; for (int i = 1; i <= 10; i++) { s = s + i; }

The given code contains a for loop that calculates the sum of integers from 1 to 10 and stores the result in the variable s. Let's break it down and then explain the equivalent while loop.

Code Analysis:

  1. int s = 0; initializes the variable s to 0, which will accumulate the sum of numbers from 1 to 10.
  2. The for loop starts with int i = 1 and runs while i is less than or equal to 10 (i <= 10). After each iteration, i is incremented by 1 (i++).
  3. Inside the loop, each value of i is added to s.

As a result, after the loop finishes execution, s will hold the sum of the integers from 1 to 10, which is 55.


Equivalent while Loop:

A while loop can produce the same result with a slightly different structure. Here's the equivalent code:

int s = 0;
int i = 1;  // Initialization of the loop control variable
while (i <= 10) {  // Loop condition
   s = s + i;      // Add the value of 'i' to 's'
   i++;            // Increment 'i'
}

What Does This Code Do?

This rewritten while loop achieves the same outcome as the original for loop. It adds integers from 1 to 10 to the variable s, resulting in the value 55 once the loop is complete. Both the original for loop and the while loop compute the same sum in a slightly different way.

Generate your own explanations
Download our vscode extension
Read other generated explanations

Built by @thebuilderjr
Sponsored by beam analytics
Read our terms and privacy policy
Forked from openai-quickstart-node