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while Statement

Executes a statement until a specified condition is false.

while (expression)
   statement

Arguments

  • expression
    Required. A Boolean expression checked before each iteration of the loop. If expression is true, the loop is executed. If expression is false, the loop is terminated.

  • statement
    Required. Statement to be executed if expression is true. Can be a compound statement.

Remarks

The while statement checks expression before a loop is first executed. If expression is false at this time, the loop is never executed.

Example

The following example illustrates the use of the while statement.

function BreakTest(breakpoint){
   var i = 0;
   while (i < 100) {
      if (i == breakpoint)
         break;
      i++;
   }
   return(i);
}

Requirements

Version 1

See Also

Reference

break Statement

continue Statement

do...while Statement

for Statement

for...in Statement