JavaScript™ 1.5 by Example

Iteration Statements

An iteration is the repetition of a sequence of statements either

• A specified number of times

• Until a condition is met

Four iteration statements are available:

• The do ... while statement

• The while statement

• The for statement

• The for ... in statement

Each of these statements performs a slightly different task, but each is a useful statement to learn how to use.

The do ... while Statement

The do ... while statement runs a statement or a block of statements and then repeats the whole process until the condition expression is false. An example will clarify this:

<script language="JavaScript">
<!-- Cloaking device on!
var x = 1
do
{
++x;
alert(x);
}
while (x < 10);
// Cloaking device off -->
</script>

The previous code has a variable, ...