how to define string print format of an object javascript code example

Example 1: printf statement in javascript

let soMany = 10;
console.log(`This is ${soMany} times easier!`);
// "This is 10 times easier!

Example 2: javascript string format

//

const firstName = 'john';
const lastName = 'smith';

const output = `name: ${firstName}, surname: ${lastName}`;
// name: john, surname: smith