How to use const with Arrays In Javascript
const variables must be initialized at the time of declaration. const variables have block scope like let.
Example: This example shows the declaration of array using const keyword.
const numbers = [1, 2, 3];
console.log(numbers[0]);
// Modifying the elements of a const array is allowed
numbers.push(4);
console.log(numbers);
Output
1 [ 1, 2, 3, 4 ]
What does Const Do in JavaScript ?
In JavaScript, const is a keyword used to declare constants. Once assigned, the value of a constant cannot be changed. It provides a way to create read-only variables. Attempting to reassign a const variable will result in a syntax error.
These are the following ways to use const:
Table of Content
- Declaring a Constant Variable
- Using const with Object Literal
- Using const with Arrays