The answer
A while loop checks the condition before running, so it might run zero times. A do-while checks the condition after running, guaranteeing at least one execution.
When to Use Do-While Loops in Algorithmic Problems
What is the main difference between while and do-while?
More FAQs in When to Use Do-While Loops in Algorithmic Problems
No, they are quite rare in standard algorithmic interviews, though they may appear in problems involving circular structures.
Yes. If the condition evaluated at the end of the loop always returns true, the loop will execute infinitely.
No, their performance is identical at the CPU level. The distinction is purely structural for code readability.
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