JavaScript

JavaScript Intro

JavaScript Intro Quiz

JavaScript Intro Exercise

JavaScript Basic

JavaScript Basic Quiz

JavaScript Basic Exercise

JavaScript Advance

JavaScript Advance Quiz

JavaScript Advance Exercise

JavaScript ES6

JavaScript ES6 Quiz

JavaScript ES6 Exercise

JavaScript Array Methods and Properties

JavaScript String Methods and Properties

JavaScript Number Methods and Properties

JavaScript Math Properties and Methods

JavaScript Date Methods and Properties

JavaScript Global Methods and Properties

JavaScript RegExp Properties and Methods

JavaScript Class Methods and Keywords

JavaScript Errors, JSON and Booleans

JavaScript Statements

JavaScript Window History Object Properties and Methods

JavaScript Window Location Object Properties and Methods

JavaScript Window Screen Object Properties

JavaScript Window Navigator Object Properties and Methods

JavaScript Window Object Properties and Methods

JavaScript Console Object Methods

JavaScript Geolocation and Storage APIs

JavaScript CSSStyleDeclaration Object Methods and Properties

HTML DOM Documents Object Properties and Methods

DOM HTMLCollection Properties and Methods

HTML DOM Attributes Properties and Methods

HTML DOM Elements Properties and Methods

HTML DOM Style Object Properties

HTML DOM AnimationEvent Properties and Methods

HTML DOM ClipboardEvent Properties and Methods

HTML DOM DragEvent Properties and Methods

HTML DOM FocusEvent Properties and Methods

HTML DOM HashChangeEvent Properties and Methods

HTML DOM InputEvent Properties and Methods

HTML DOM KeyboardEvent Properties and Methods

HTML DOM MouseEvent Properties and Methods

HTML DOM PageTransitionEvent Properties and Methods

HTML DOM ProgressEvent Properties and Methods

HTML DOM StorageEvent Properties and Methods

HTML DOM TransitionEvent Properties and Methods

HTML DOM WheelEvent Properties and Methods

HTML DOM UiEvent Properties and Methods

HTML DOM TouchEvent Properties and Methods

The Event Object Properties and Methods

User Defined Functions in JavaScript

Functions in JavaScript

 

 

A JavaScript function is a block of code designed to perform a particular task. Its main advantage is code reusability. Therefore we can say that the same code with different arguments produces different results.

 

Defining a Function:-

 

To define a JavaScript function, use the function keyword, followed by a name, followed by a set of parentheses ().

 

The javaScript function syntax is:-

 

function name() {
//code to be executed
}

 

Calling a Function:-

 

To call a function, start with the name of the function, then follow it with the arguments in parentheses like name(). We can call a function multiple times. Another way to call a function is by putting its name followed by a dot and then call() method like name.call().

Code Explanation

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