JavaScript Operators

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="keywords" content="javascript operators, complete list, artithmentic, comparison, binary, boolean, strings, javascript tutorial, code, function, source, learn, method, javascript dropdown menu, rollovers, form validation, pop up windows, scripting, jscript, reference"> <meta name="Description" content="Learn about JavaScript operators, includes complete list."> <link rel="canonical" href="https://www.quackit.com/javascript/tutorial/javascript_operators.cfm"> <title>JavaScript Operators</title> <script src="//ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <link rel="shortcut icon" href="/pix/favicon96.png"> <link rel="apple-touch-icon" href="/pix/apple-touch-icon.png"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link href="https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,700;1,400&display=swap" rel="stylesheet"> <link href="/common/css/master.45.min.css" rel="stylesheet"> <script async src="https://cdn.fuseplatform.net/publift/tags/2/3499/fuse.js"></script>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-Q3H025ZKLN"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-Q3H025ZKLN'); </script> </head> <body> <header class="site-header"> <div class="site-header-base"> <div class="site-logo"> <a title="Quackit Homepage" target="_top" href="/"><img src="/pix/quackit_logo_watermark.png" width="87" height="33" alt="Quackit Logo"></a> </div> <button id="site-nav-toggler" class="site-nav-toggler" aria-expanded="false" aria-controls="site-nav"> <span class="sr-only">Toggle navigation</span> ☰ </button> </div> <nav id="site-nav" class="site-nav"> <div class="site-links"> <ul> <li><a href="/"><i class="fa fa-home"></i> <span class="sr-only">Home</span></a></li> <li><a href="/html/">HTML</a></li> <li><a href="/css/">CSS</a></li> <li><a href="/scripting/">Scripting</a></li> <li><a href="/database/">Database</a></li> </ul> </div> <div class="site-search-top"> <form action="/search/" id="cse-search-box-bottom" class="site-search"> <div> <input type="hidden" name="cx" value="partner-pub-6331358926293806:98x0fk-bbgi"> <input type="hidden" name="cof" value="FORID:10"> <input type="hidden" name="ie" value="ISO-8859-1"> <input type="text" name="q" size="20" class="site-search-input"> <button type="submit" name="sa" class="site-search-button"><i class="fa fa-search"></i></button> </div> </form> </div> </nav> </header> <div class="main"> <article class="content"> <h1 class="page-title">JavaScript Operators</h1> <div class="ad ad-top">  <div data-fuse="23059883623"></div> </div> <ul class="pager"> <li><a href="/javascript/tutorial/external_javascript_file.cfm"><i class="fa fa-long-arrow-left" aria-hidden="true"></i> External JavaScript</a></li> <li><a href="/javascript/tutorial/javascript_variables.cfm">JavaScript Variables <i class="fa fa-long-arrow-right" aria-hidden="true"></i></a></li> </ul> <p class="lead">JavaScript operators are used to perform an operation. There are different types of operators for different uses. </p> <p>Below is a listing of JavaScript operators and a brief description of them. Don't worry if you don't understand all of them at this stage — just bookmark this page for reference and return whenever you need to.</p> <div class="ad">  <div data-fuse="23059883629"></div> </div> <h2>Arithmetic Operators</h2> <table class="tabular"> <tr> <th width="30%">Operator</th><th>Description</th> </tr> <tr> <td>+</td><td>Addition</td> </tr> <tr> <td>-</td><td>Subtraction</td> </tr> <tr> <td>*</td><td>Multiplication</td> </tr> <tr> <td>/</td><td>Division</td> </tr> <tr> <td>%</td><td>Modulus (remainder of a division)</td> </tr> <tr> <td>++</td><td>Increment</td> </tr> <tr> <td>--</td><td>Decrement</td> </tr> </table> <h2>Assignment Operators</h2> <table class="tabular"> <tr> <th width="30%">Operator</th><th>Description</th> </tr> <tr> <td>=</td><td>Assign</td> </tr> <tr> <td>+=</td><td>Add and assign. For example, x+=y is the same as x=x+y.</td> </tr> <tr> <td>-=</td><td>Subtract and assign. For example, x-=y is the same as x=x-y.</td> </tr> <tr> <td>*=</td><td>Multiply and assign. For example, x*=y is the same as x=x*y.</td> </tr> <tr> <td>/=</td><td>Divide and assign. For example, x/=y is the same as x=x/y.</td> </tr> <tr> <td>%=</td><td>Modulus and assign. For example, x%=y is the same as x=x%y.</td> </tr> </table> <h2>Comparison Operators</h2> <table class="tabular"> <tr> <th width="30%">Operator</th><th>Description</th> </tr> <tr> <td>==</td><td>Is equal to</td> </tr> <tr> <td>===</td><td>Is identical (is equal to and is of the same type)</td> </tr> <tr> <td>!=</td><td>Is not equal to</td> </tr> <tr> <td>!==</td><td>Is not identical</td> </tr> <tr> <td>></td><td>Greater than</td> </tr> <tr> <td>>=</td><td>Greater than or equal to</td> </tr> <tr> <td><</td><td>Less than</td> </tr> <tr> <td><=</td><td>Less than or equal to</td> </tr> </table> <h2>Logical/boolean Operators</h2> <table class="tabular"> <tr> <th width="30%">Operator</th><th>Description</th> </tr> <tr> <td>&&</td><td>and</td> </tr> <tr> <td>||</td><td>or</td> </tr> <tr> <td>!</td><td>not</td> </tr> </table> <h2>String Operators</h2> <p>In JavaScript, a <dfn>string</dfn> is simply a piece of text.</p> <table class="tabular"> <tr> <th width="30%">Operator</th><th>Description</th> </tr> <tr> <td>=</td><td>Assignment</td> </tr> <tr> <td>+</td><td>Concatenate (join two strings together)</td> </tr> <tr> <td>+=</td><td>Concatenate and assign</td> </tr> </table> <p>You will learn how to use some of the most common of these JavaScript operators in the following pages.</p> <ul class="pager"> <li><a href="/javascript/tutorial/external_javascript_file.cfm"><i class="fa fa-long-arrow-left" aria-hidden="true"></i> External JavaScript</a></li> <li><a href="/javascript/tutorial/javascript_variables.cfm">JavaScript Variables <i class="fa fa-long-arrow-right" aria-hidden="true"></i></a></li> </ul> </article> <div class="sidebar"> <nav> <ul> <li> <h3><a href="/javascript/tutorial/">JavaScript Tutorial</a></h3> <ul> <li><a href="/javascript/tutorial/introduction.cfm">Introduction</a></li> <li><a href="/javascript/tutorial/how_to_enable_javascript.cfm">How to Enable JavaScript</a></li> <li><a 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JavaScript Operators