WMLScript » Statements » while

Syntax:
while

The while statement creates a loop that evaluates a expression to see if it is true or false, and if true, executes a block of statements and then repeats the loop, or if false, immediately exits the loop.

The while statement will iterate the loop as long as the specified expression remains true. Therefore, if the expression never tests false, the loop will continue forever in what is called an "infinite loop."

The block of statements executed by the while statement can be any legal WMLS code (including more while statements).

Examples

Code:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.WAPforum.org/DTD/wml_1.1.xml">
<wml>

<card id="card1">
   <p>
   while example
   </p>
   <do type="accept">
      <go href="WhileExample.wmls#findwhile()" />
   </do>
</card>

<card id="card2">
<p>
   sum = $(sum)
</p>
</card>

</wml>
Explanation:

Code for WhileExample.wml

Language(s): WML
Code:
extern function findwhile()
{
   var sum = 0;
   while(sum < 1000)
   {
      sum = sum + Lang.random(100);
   }
   WMLBrowser.setVar("sum", sum);
   WMLBrowser.go("WhileExample.wml#card2");
};
Explanation:

Code for WhileExample.wmls

Language(s): WML

See Also: