Question

How is WHILE...END WHILE loop different from DO UNTIL loop?​

Answer 1

If the condition in a while loop is false, not a single statement inside the loop is executed. In contrast, if the condition in 'do-while' loop is false, then also the body of the loop is executed at least once then the condition is tested.

Answer 2

both while and do-while is an unfixed iterative loop.

while loop is entry control loop and do-while loop is an exit control loop.

hope it helps you ☺.