Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop in C programming checks its condition at the bottom of the loop.
A do...while loop is similar to a while loop, except for the fact that it is guaranteed to execute at least one time.
Syntax:
do {
statement(s);
} while(condition);
Flowchart of Do..While Loop In C
Flowchart image or diagram here