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JavaScript Array() Constructor

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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

Last Updated : 30 Mar, 2023
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