# How to define integer constants in JavaScript?

JavascriptWeb DevelopmentFront End Technology

ECMAScript allows usage of const to define constants in JavaScript. To define integer constants in JavaScript, use the const,

const MY_VAL = 5;
// This will throw an error
MY_VAL = 10;

As shown above, MY_VAL is a constant and value 5 is assigned. On assigning, another value to a constant variable shows an error.

Using const will not allow you to reassign any value to MY_VAL again. If you will assign a new value to a constant, then it would lead to an error.

Published on 12-Feb-2018 16:28:04