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JavaScript: function Operator

Description

The function operator defines a function inside an expression.

Version

Implemented in JavaScript 1.5

Syntax

var1 = function( parameter1, parameter2,......parametern)
{
statement(s)
}

Parameters

parameters: A list of arguments to the function.

statement(s): JavaScript statements.

Example:

The following web document demonstrates the use of function operator. It sets x to a function that returns the square of two numbers.

HTML Code

<!doctype html>
<head>
<meta charset="utf-8"> <title>JavaScript function operator example.</title> ;meta name="description" content="This document contains an example of JavaScript function operator "/> </head>
<script src="javascript-function-operator-example1.js"></script>
</body>
</html>

JS Code


var a = 12;
var b = 14;
var x = function(a,b)
{
return a*a+2*a*b+b*b;
};
console.log("The square of "+a+ " and "+b +" is " +x(a,b));

View the example in the browser

Practice the example online

See the Pen function-1 by w3resource (@w3resource) on CodePen.


See also

Conditional Operator
comma
delete
in
instanceof
new
this
typeof
void

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Next: JavaScript: in Operator

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JavaScript: Tips of the Day

Using the window.location object

JavaScript can access the current URL using the window.location object. Pretty neat, but even cooler is that this object contains certain parts of the URL as well.
Get access to the protocol/host/pathname/search/and more!

// JavaScript can access the current URL in parts. For this URL:
'https://thatsanegg.com/example/index.html?s=article'
window.location.protocol == 'https:'
window.location.host == 'thatsanegg.com'
window.location.pathname == '/example/index.html'
window.location.search == '?s=article'

Ref: https://bit.ly/2LBj213