Given the code int num = 100; int count = 0; do { num--; count++; } while (count > 1); System.out.println ("num = " + num); What is the result?

The correct answer is C. num = 99. Option C is correct because a do-while loop always executes its body at least once before checking the condition. On that single execution, num decrements from 100 to 99 and count increments from 0 to 1 - then the condition count > 1 evaluates to 1 > 1, which is false, so the…

Control Flow

Question

Given the code
int num = 100;
int count = 0;
do {
num--;
count++;
} while (count > 1);
System.out.println ("num = " + num);
What is the result?

Options

AThe program executes indefinitely.
Bnum = 100
Cnum = 99
Dnum = 0

How the community answered

(19 responses)

A
5% (1)
B
5% (1)
C
89% (17)

Explanation

Option C is correct because a do-while loop always executes its body at least once before checking the condition. On that single execution, num decrements from 100 to 99 and count increments from 0 to 1 - then the condition count > 1 evaluates to 1 > 1, which is false, so the loop exits immediately.

A is wrong because the loop does terminate: count becomes 1 after the first pass, and 1 > 1 is false, so execution stops cleanly. B is wrong because num-- runs before any condition is checked - there's no way for num to stay at 100. D is wrong because the loop body runs only once, not 100 times; that would require the condition to keep count below some threshold and eventually reach 0.

Memory tip: Think of do-while as "act first, ask permission later" - the body always fires once regardless of the condition, which is the key trap this question is testing.

Topics

#do-while loops#loop termination#condition evaluation#control flow

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