Loops through the statements enclosed within the { code block } until the test_expression is false:
while (test_expression) {
statements ;
}
<html>
<head>
<title>JavaScript</title>
</head>
<body>
<script type="text/javascript">
var val = 0;
while (val < 5) {
document.write("val = " + val + "<br>");
val++ ; //increment val
}
</script>
</body>
</html>
Save & refresh browser:
| val = 0 val = 1 val = 2 val = 3 val = 4 |