JavaScript Addition (+) Operator (original) (raw)

Last Updated : 19 Sep, 2024

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.

JavaScript `

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

`

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

JavaScript `

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