what is the different about pretest loop and the postest loop.

Answer 1

A pretest loop will check the condition first and a posttest loop will check the condition after running through the loop body once. Because of this, a pretest loop may not run at all but a posttest loop is guaranteed to run at least one time.

Answer 2

do you mean whats the difference between ++i and i++?

Answer 3

yes sir

Answer 4

for post test, the value of i gets incremented after the loop runs through and for pretest the value gets incremented before the loop runs through