JavaScript: Initialize and fill an array with the specified values

JavaScript fundamental (ES6 Syntax): Exercise-213 with Solution

Initialize and Fill Array

Write a JavaScript program to initialize and fill an array with the specified values.

• Use Array.from() to create an array of the desired length, Array.prototype.fill() to fill it with the desired values.
• Omit the last argument, val, to use a default value of 0.

Sample Solution:

JavaScript Code:

// Define a function 'initializeArrayWithValues' that creates an array of length 'n' filled with a specified value 'val'
const initializeArrayWithValues = (n, val = 0) => Array(n).fill(val);

// Test the 'initializeArrayWithValues' function by creating arrays of specified lengths filled with specified values
console.log(initializeArrayWithValues(5, 2));
// Output: [2, 2, 2, 2, 2]
console.log(initializeArrayWithValues(4, 0));
// Output: [0, 0, 0, 0]

Output:

[2,2,2,2,2]
[0,0,0,0]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-213-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that creates an array of a specified length and fills it with a given value.
• Write a JavaScript function that uses Array.fill() to initialize an array with dynamic content.
• Write a JavaScript program that generates an array from a seed value and a filling function.
• Write a JavaScript function that returns an array pre-populated with a repeated pattern of values.

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• JavaScript fundamental Part-II Exercises Home ↩
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