| 3. 6. 1. while loop |
|
|
The while loop can be summarized as while the expression evaluates to true, execute the statements in the loop. |
Once the last statement in the loop is executed, go back to the top of the loop and evaluate the expression again. |
When the expression evaluates to false, the next line of code following the while loop structure is executed. |
Because the expression is evaluated before the loop, it is possible the loop will never be executed. |
The format of the while loop looks like the following: |
|
while (expression)
{
statement;
}
|
|
|
<html>
<SCRIPT LANGUAGE='JavaScript'>
<!--
var light = "red";
var counter = 1;
var carsInLine = new Array();
while (counter <= 5)
{
document.write("Car ",counter," approaches intersection.<BR>");
counter++; //Next car
}
//-->
</SCRIPT>
</html>
|
|