do Statement

do
statement
while(expression);

The do keyword executes statement repeatedly until expression becomes false (0).

Example

// Example of the do-while statement
do
{
    y = f( x );
    x--;
} while ( x > 0 );

In this do-while statement, the two statements y = f( x ); and x--; are executed, regardless of the initial value of x. Then x > 0 is evaluated. If x is greater than 0, the statement body is executed again and x > 0 is reevaluated. The statement body is executed repeatedly as long as x remains greater than 0. Execution of the do-while statement terminates when x becomes 0 or negative. The body of the loop is executed at least once.

For related information, see while, break, and continue.