Prestwood IT: JavaScript Unary Operators (JavaScript and AJAX)

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JavaScript Beginners Corner:

JavaScript Unary Operators

By Mike Prestwood

Posted 16 years ago on 11/6/2008 and updated 1/2/2009

JavaScript Code Snippet:

To/From Code Guide: JavaScript Unary Ope... vs. Other Languages

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Tags: JavaScript , Unary Operators

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


Comments 1 Comments. Share a thought or comment...

PS_3268

Comment 1 of 2

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Posted 46 months ago

PS_4399

Comment 2 of 2

@slope game This is very helpful and practical information; thank you for providing it.

Posted 53 days ago

Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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KB101558

General Info: Unary Operator

Languages Focus: Unary Operators

JavaScript Unary Operators

Working Example

More Info

Comments