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   ► KBWebsite Scri...JavaScript a...Beginners Co...   Print This     
 
JavaScript Beginners Corner:
JavaScript Unary Operators
 
Posted 12 years ago on 11/6/2008 and updated 1/2/2009
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KB101558

General Info: Unary Operator

An operation with only one operand (a single input). Common unary operators include + plus, - minus, and bitwise not. Some operators can function as both unary and binary operators. For example, + and - operators can serve as either.

Languages Focus: Unary Operators

What unary operators are supported in additoin to the standard plus, minus, and bitwise not.

JavaScript Unary Operators

An operation with only one operand (a single input). JavaScript unary operators include ++ and --. They can be used either before or after a variable as in: a++, b--, and ++a, and --b.

Examples:

iCounter++;
iCounter--;
 
++iCounter;
--iCounter;
Syntax Example:
var iCounter=0;
 
for (iCounter=0;iCounter<=5;iCounter++)
{
document.write("Count is " + iCounter + "<br>");
}

Working Example

<html>
<body>
 
<script language=JavaScript>
<!--
var iCounter=0;
 
for (iCounter=0;iCounter<=5;iCounter++)
{
document.write("Count is " + iCounter + "<br>");
}
//-->
</script>
</body>
</html>
 

More Info

Definition:  Unary Operator

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