JavaScript Addition (+) Operator

JavaScript addition (+) operator is one of the most fundamental and widely used arithmetic operators in JavaScript. It is used to perform arithmetic addition on numbers but also concatenate strings.

Syntax

a + b

Where -

• a: The first value (number, string, or another data type).
• b: The second value (number, string, or another data type).

Return Type: It returns the sum/concatenation of numbers/strings.

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

3
NaN
2
1

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

12
Hello Geek

Supported Browser

• Chrome 1
• Edge 12
• Firefox 1
• Opera 3
• Safari 1

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