Consider the following code :
int i = 0; while (i

Question

Consider the following code :
int i = 0; while (i < 5) {
MessageBox.Show(i.ToString()); i++; }
Which of the following is correct?

BlackTom AI · Accepted Answer

To analyze what the loop does, I’ll step through how the code executes on each iteration.
First, the variable i is initialized to 0. The while condition checks i < 5 before each iteration, so the loop will run as long as i is less than 5. Inside the loop, the current value of i is shown via MessageBox.Show(i.ToString()), and then i is incremented by 1 (i++).
Option a says the loop will only run once. Since i starts at 0 and after the first iteration i becomes 1, the condition i < 5 is still true, so the loop continues. Therefore, it does not stop after a single pass.
Option b claims the loop will run indefinitely. That would require i never reaching 5. However, i is incremented each time through the loop, so after five iterations i will reach 5 and the condition i < 5 will be false, terminating the loop.
Option c states the loop will display numbers 1 to 5. The first value shown is i.ToString() with i equal to 0 on the first pass, so 0 is displayed first, not 1. Hence this option misstates the starting value and the end value.
Option d asserts the loop will display numbers 0 to 4. Given the initialization i = 0, the sequence of i values shown is 0, 1, 2, 3, 4, each on its own iteration, before i becomes 5 and the loop stops. This aligns with the loop’s guard (i < 5) and the increment (i++).
In summary, each candidate has been checked against the control flow: initialization, loop condition, body execution, and the increment step. Only the behavior described in option d matches how i progresses from 0 up to 4 and then stops when i reaches 5.

Introduction To Object Oriented Programming (082025-CMM)

Consider the following code : int i = 0; while (i < 5) { MessageBox.Show(i.ToString()); i++; } Which of the following is correct?

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