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while Statement

Executes a statement until a specified condition is false.

while (expression)
   statement

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.

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

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);
}
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