js-let-variable

let mango;  // Declaration or Initialization
mango = "We are mango people";  // String type data asisgned in mango variable

// Or you can declare or initialize and assign value all in onec.
let myNumber = 32;
let myString = 'Hello, World!';
let myBoolean = true;

// If you want to see the output
console.log(mango); // We are mango people
console.log(myNumber); // 32
console.log(myString); // Hello, World!
console.log(myBoolean); // true;