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Javascript Theory

Array

An array is an object that can be store a collection of items. An array is a collection of elements. And it is used to store the multiple values in one variable. Each value stored in an array is called an element of the array. An array can be of any type, for example int, char, float ..etc. The first element of an array starts with index zero.

Types of Arrays

An array can be declared in two types:

  • Array literal
  • Array constructor
Array literal

Array literal

It takes a list of values separated by a comma and enclosed in square brackets.

Syntax
var array-name =[element 0, element1, element 2, ......element N];
Example: var skillpundit = ["C", "Java", "PHP","Python"];
var skillpundit = [1, 2, 3, 4];
Array constructor

Array constructor

In array constructor you can use the 'new' keyword to initialize an array.

Syntax
var array_name = new Array();
var array_name = new Array(element1, element2,...... elementN);
Example: var skillpunit = new Array(1, 2, 3, 4);