Description:
do/while loops are very similar to
while loops, except the truth expression is checked at the end of each iteration instead of in the beginning. The main difference from regular
while loops is that the first iteration of a do..while loop is guaranteed to run (the truth expression is only checked at the end of the iteration), whereas it's may not necessarily run with a regular
while loop (the truth expression is checked at the beginning of each iteration, if it evaluates to
false right from the beginning, the loop execution would end immediately).
Advanced C users may be familiar with a different usage of the do..while loop, to allow stopping execution in the middle of code blocks, by encapsulating them with do..while(0), and using the
break statement.