JavaScript Arithmetic Operators

Arithmetic operators are used to perform basic mathematical calculations like addition, subtraction, multiplication, and more.

1. Addition (+)

Adds two numbers or combines strings.

Example (Numbers):

let a = 5;
let b = 3;
let sum = a + b;
console.log(sum); // 8

Example (Strings):

let firstName = "John";
let lastName = "Doe";
let fullName = firstName + " " + lastName;
console.log(fullName); // John Doe

2. Subtraction (-)

Subtracts one number from another.

let a = 10;
let b = 4;
console.log(a - b); // 6

3. Multiplication (*)

Multiplies two numbers.

let a = 6;
let b = 3;
console.log(a * b); // 18

4. Division (/)

Divides one number by another.

let a = 20;
let b = 4;
console.log(a / b); // 5

5. Modulus (%)

Gives the remainder of a division.

let a = 10;
let b = 3;
console.log(a % b); // 1

6. Exponentiation (**)

Raises a number to the power of another number.

let a = 2;
let b = 3;
console.log(a ** b); // 8

7. Increment (++)

Adds 1 to a variable.

let x = 5;
x++;
console.log(x); // 6

8. Decrement (--)

Subtracts 1 from a variable.

let x = 5;
x--;
console.log(x); // 4

Summary Table

Operator	Meaning	Example
+	Addition	5 + 3
-	Subtraction	10 - 4
*	Multiplication	5 * 2
/	Division	20 / 4
%	Modulus	10 % 3
**	Exponentiation	2 ** 3
++	Increment	x++
--	Decrement	x--