Can you Compare while and do-while?

Answer 1

The 'while' statement evaluates its expression at the beginning of the loop, while a 'do while' statement evaluates its expression at the end of the loop. The 'while' statement might execute no times. The 'do while' statement will execute at least one time. It depends on what you want to do, and on how you want to use the side effects, if any, of the expressions in the expression. (Before or after)

Answer 2

A while() loop evaluates the conditional expression before entering the loop for the first time. If the conditional expression evaluates false, the loop does not execute. If the conditional expression evaluates true, the loop begins to iterate, evaluating the conditional expression before starting a new iteration.

A do...while() loop evaluates the conditional expression at the end of the first loop. and is therefore guaranteed to enter the loop at least once. If the conditional expression evaluates true, the loop begins to iterates, re-evaluating the conditional expression at the end of each iteration.