Operators

JavaScript operators are the symbols that perform operations on one or more operands (variables, values, etc.). Understanding them is fundamental to writing effective JavaScript code. This post will cover the various types of JavaScript operators with clear explanations and practical examples.

Arithmetic Operators

These operators perform basic mathematical calculations.

Operator	Description	Example	Result
+	Addition	5 + 3	8
-	Subtraction	10 - 4	6
*	Multiplication	7 * 2	14
/	Division	15 / 3	5
%	Modulus (remainder)	17 % 5	2
++	Increment (adds 1)	let x = 5; x++	6
--	Decrement (subtracts 1)	let x = 5; x--	4
**	Exponentiation	2 ** 3	8

let a = 10;
let b = 5;

console.log(a + b); // 15
console.log(a - b); // 5
console.log(a * b); // 50
console.log(a / b); // 2
console.log(a % b); // 0
a++;
console.log(a); // 11
b--;
console.log(b); // 4
console.log(2 ** 4); //16

Assignment Operators

These operators assign values to variables.

Operator	Description	Example	Equivalent
=	Assignment	x = 10
+=	Add and assign	x += 5	x = x + 5
-=	Subtract and assign	x -= 3	x = x - 3
*=	Multiply and assign	x *= 2	x = x * 2
/=	Divide and assign	x /= 4	x = x / 4
%=	Modulus and assign	x %= 3	x = x % 3
**=	Exponentiation and assign	x **= 2	x = x ** 2

let x = 10;
x += 5; // x is now 15
x -= 3; // x is now 12
x *= 2; // x is now 24
x /= 4; // x is now 6
x %= 3; // x is now 0
x **= 2; // x is now 0

Comparison Operators

These operators compare two values and return a boolean (true or false) result.

Operator	Description	Example	Result
==	Equal to	5 == 5	true
!=	Not equal to	5 != 10	true
===	Strict equal to	5 === '5'	false
!==	Strict not equal to	5 !== '5'	true
>	Greater than	10 > 5	true
<	Less than	5 < 10	true
>=	Greater than or equal	10 >= 10	true
<=	Less than or equal	5 <= 10	true

console.log(5 == 5);     // true
console.log(5 == '5');   // true (loose equality)
console.log(5 === '5');   // false (strict equality)
console.log(10 > 5);    // true
console.log(5 < 10);    // true

Logical Operators

These operators combine or modify boolean expressions.

Operator	Description	Example	Result
&&	Logical AND	true && false	false
\|\|	Logical OR	true \|\| false	true
!	Logical NOT	!true	false

console.log(true && false); // false
console.log(true || false); // true
console.log(!true);         // false

This guide provides an overview of JavaScript operators. Mastering these operators is important for building efficient JavaScript applications. Remember to choose between loose (==, !=) and strict (===, !==) equality based on your specific needs. Happy coding!