while (expression)               /* while this expression is True */
{
    statement;                   /* execute this statement */
    [statement;]...              /* and these additional statements */
}

where:

The while statement evaluates an expression and executes the following statement or statements until the expression evaluates to False.

The while statement must be followed by an expression in parentheses. As long as the expression evaluates to True, all following statements are repeatedly executed. When the expression evaluates to False, all statements are bypassed and execution continues at the next statement outside the while loop. If you have more than one statement in the loop these must be enclosed in curly braces ({}).

None

None

This example shows how to use while in a macro:

define /R void whileloop()
{
  int x;
  x = 1;
  while (1) {
    $printf "Iteration: %d\n", x$;
     if (x > 10) {
      $printf "Done!\n"$;
      break;
    } else if (x==5) {
      $printf "Halfway there...\n"$;
    }
    x++;
  }
}
.