Plus operator

In javascript, plus operator can be used for multiple purposes.

In previous session we have already done sum function, where + operator is used to add numbers. But it can be also used for concatenate two or more strings together.

For example,

let firstName = "Jack";
let lastName = "Steve";
console.log(firstName + " " + lastName); // Jack Steve

+= operator

let sum = 10;
sum = sum + 10;
console.log(sum); // 20

The above example can be rewrited by using += operator.

let sum = 10;
sum += 10;
console.log(sum); // 20