JavaScript Array() Constructor (original) (raw)

Last Updated : 12 Jul, 2024

The **Array() constructor is used to create Array objects and the array constructor can be called with or without a new keyword, both can create a new Array.

**Syntax:

new Array(Value1, Value2, ...);
new Array(ArrayLength);

Array(Value1, Value2, ...);
Array(ArrayLength);

**Parameters:

• **ValueN: An array initialized by the given value, except in the case where only one value is provided to the array constructor and that value is a number. Unfortunately, the previous condition does not hold true if an array is built using the [ ]operator.
• **arrayLength: If the Value is only one element that is also a number between 0 and 2^32 - 1 then an array object is created with the length property set to the array property.

**Example 1: In this example, we will use the basic use of the Array() constructor.

JavaScript `

// Using elements const array1 = new Array(1, 2, 3, 4, 5)

// Using arrayLength const array2 = new Array(10)

console.log(array1); console.log(array2);

`

**Output:

(5) [1, 2, 3, 4, 5]
(10) [empty × 10]

**Example 2: In this example, we will use an array with a string value.

JavaScript `

const language = new Array("HTML", "CSS", "Javascript");

console.log(language.length); console.log(language[0]); console.log(language[1]); console.log(language[2]);

`

**Output:

3
HTML
CSS
JavaScript

We have a complete list of Javascript Array() methods, to check those please go through this JavaScript Array Reference article.

**Supported Browsers:

• Chrome 1
• Edge 12
• Firefox 1
• Opera 4
• Safari 1