Addition(+) Arithmetic Operator in JavaScript

JavaScript arithmetic addition operator is capable of performing two types of operation that is addition and concatenation. It is used to perform some on the number or concatenate Strings.

Syntax:

a+b

Return Type: It returns the sum/concatenation of operators.

Example 1: In this example, we will use the addition operator on some primitive data types and check their equivalent sum.

Javascript

console.log(1+2);
console.log(NaN +1);
console.log(true+1);
console.log(false+1);

Output:

3
NaN
2
1

Example 2: In this example, we will use the addition operator to perform concatenation

Javascript

console.log("1"+2);
console.log("Hello " +"Geek");

Output:

12
Hello Geek

Supported Browser:

• Chrome
• Edge
• Firefox
• Opera
• Safari

We have a complete list of Javascript Arithmetic operators, to check those please go through this JavaScript Arithmetic Operators article.