How to use the Array() Constructor and fill() Method In Javascript
The Array constructor can be used to create an array of a specific length. The fill() method can fill this array with a specified value.
Syntax:
const filledArray = new Array(length).fill(value);
Example: Below is the implementation of the above approach
const length = 5;
const value = 5;
const filledArray = new Array(length).fill(value);
console.log(filledArray);
Output
[ 5, 5, 5, 5, 5 ]
JavaScript Program to Create an Array with a Specific Length and Pre-filled Values
In JavaScript, we can create an array with a specific length and pre-filled values using various approaches. This can be useful when we need to initialize an array with default or placeholder values before populating it with actual data.
Table of Content
- Using the Array() Constructor and fill() Method
- Using a Loop to Initialize Values
- Using the map() Method
- Using Array.from with a Mapping Function