Which term describes a loop that checks its condition after the block has executed?

Which term describes a loop that checks its condition after the block has executed?

• A. Counting
• B. Pre-condition loops
• C. Post-condition loops
• D. Sequence

Answer: (C)

A post-condition check describes a loop where the condition is tested after the loop body has run. The body executes first, and then the condition is evaluated to decide whether to repeat. This means the loop is guaranteed to run at least once. In code, it’s the do-while style: do { ... } while (condition); The loop keeps repeating while the condition remains true, but the initial execution happens without any prior test. This contrasts with a pre-condition loop, which tests the condition before running the body and might do zero executions if the initial test fails. It’s also different from a counting loop, which revolves around a fixed number of iterations, and from a simple sequence, which doesn’t involve repeating actions at all.

A post-condition check describes a loop where the condition is tested after the loop body has run. The body executes first, and then the condition is evaluated to decide whether to repeat. This means the loop is guaranteed to run at least once. In code, it’s the do-while style: do { ... } while (condition); The loop keeps repeating while the condition remains true, but the initial execution happens without any prior test.

This contrasts with a pre-condition loop, which tests the condition before running the body and might do zero executions if the initial test fails. It’s also different from a counting loop, which revolves around a fixed number of iterations, and from a simple sequence, which doesn’t involve repeating actions at all.