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19.6.2 do-while Statement

The dowhile statement is a simple loop construct that performs the test at the end of the iteration.

while (test);

Here, body is a statement (possibly a block) to repeat, and test is an expression that controls whether to repeat it again.

Each iteration of the loop starts by executing body. Then it computes test and, if it is true (nonzero), that means to go back and start over with body. If test is false (zero), then the loop stops repeating and execution moves on past it.