define const in javascript code example

Example 1: what is const in javascript

const age; // errror as const cannot be kept un-initialized;
const age = 20 ; 
const age = 21 , // error as once declared const variable cann't be
// re-declared in same scope or different scope.

Example 2: const in javascript

const value = 10;
const constant = value;

Example 3: javascript const

const b = 1; // this variable unique and can't change it.

Example 4: how to create a constant in javascript

const example1 = "hello this is string variable" ; //this is string constant
const example2 = 12345 ; //this is numeric constant
const example3 = true ; //boolean constant