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