Good point Mayank, sizeof operator just checks the type of the expr given to it. it will not execute the expression.Thanks for correct explanation and keep posting. By the way...

sory guys, i have n't checked the whole chain , pradeep has already posted this metho 😔

Hi friends, I have one method, i will try other two. mean while review this method int i, n = 20; for (i = 0; i < n; n--) {...