while loop

while loops will loop continuously, and infinitely, until the expression inside the parenthesis, () becomes false. Something must change the tested variable, or the while loop will never exit.

do…while loop

The do…while loop is similar to the while loop. In the while loop, the loop-continuation condition is tested at the beginning of the loop before performed the body of the loop.

for loop

A for loop executes statements a predetermined number of times. The control expression for the loop is initialized, tested and manipulated entirely within the for loop parentheses.

Nested Loop

C language allows you to use one loop inside another loop. The following example illustrates the concept.

Infinite loop

It is the loop having no terminating condition, so the loop becomes infinite.