HP C/iX Reference Manual (31506-90011)

90 Chapter6
Statements
The while Statement
The while Statement
The while statement evaluates an expression and executes the loop body until the
expression evaluates to false.
Syntax
while ( expression )
statement
Description
The controlling expression is evaluated at run time. If the controlling expression has a
nonzero value, the loop body is executed. Then control passes back to the evaluation of the
controlling expression. If the controlling expression evaluates to 0, control passes to the
statement following the loop body. The test for 0 is performed before the loop body is
executed. The loop body of a while statement with a controlling constant expression that
evaluates to 0 never executes.
Example
i=0;
while (i < 3) {
func (i);
i++;
}
The example shown above calls the function func three times, with the argument values of
0, 1, and 2.