Introduction

In JavaScript, operators are symbols used to perform operations on values and variables. They allow us to manipulate data, perform calculations, compare values, and make logical decisions in our programs.

For example:

let sum = 5 + 3;

Here, + is an operator that adds two numbers.

Operators are essential in programming because they help us write logic, perform calculations, and control how programs behave.

In this article, we will explore the most commonly used JavaScript operators, including arithmetic, comparison, logical, and assignment operators.

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1. What Operators Are

An operator is a symbol that performs an operation on one or more values.

These values are called operands.

Example:

let result = 10 + 5;

Explanation:

Part	Meaning
10	Operand
+	Operator
5	Operand

The operator performs an operation on the operands.

Operators in JavaScript help with:

• Performing calculations

• Comparing values

• Assigning values

• Building logical conditions

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2. Arithmetic Operators

Arithmetic operators are used to perform mathematical calculations.

Common Arithmetic Operators

Operator	Description	Example
+	Addition	5 + 3
-	Subtraction	10 - 4
*	Multiplication	6 * 2
/	Division	8 / 2
%	Modulus (remainder)	10 % 3

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Example

let a = 10;
let b = 3;

console.log(a + b); // 13
console.log(a - b); // 7
console.log(a * b); // 30
console.log(a / b); // 3.33
console.log(a % b); // 1

The modulus operator % returns the remainder after division.

Example:

10 % 3 = 1

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3. Comparison Operators

Comparison operators compare two values and return a boolean value (true or false).

Common Comparison Operators

Operator	Meaning	Example
==	Equal to	5 == "5"
===	Strict equal	5 === "5"
!=	Not equal	5 != 3
>	Greater than	10 > 5
<	Less than	3 < 8

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Example

let a = 5;
let b = "5";

console.log(a == b);   // true
console.log(a === b);  // false

Explanation:

• == compares values but ignores data type

• === compares both value and type

Example:

5 == "5"   → true
5 === "5"  → false

Using === is generally recommended because it avoids unexpected type conversions.

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4. Logical Operators

Logical operators are used to combine multiple conditions.

They are commonly used in if statements and control flow.

Logical Operators

Operator	Meaning
&&	Logical AND
!	Logical NOT

Logical AND (&&)

Returns true only if both conditions are true.

Example:

let age = 20;

if (age > 18 && age < 30) {
  console.log("Young adult");
}

Both conditions must be true.

Logical OR (||)

Returns true if at least one condition is true.

Example:

let role = "admin";

if (role === "admin" || role === "editor") {
  console.log("Access granted");
}

Logical NOT (!)

Reverses the boolean value.

Example:

let isLoggedIn = false;

console.log(!isLoggedIn); // true

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5. Assignment Operators

Assignment operators are used to assign values to variables.

Common Assignment Operators

Operator	Example	Meaning
=	x = 5	Assign value
+=	x += 3	Add and assign
-=	x -= 2	Subtract and assign

Example

let x = 10;

x += 5;
console.log(x); // 15

This is the same as:

x = x + 5;

Another example:

let y = 20;

y -= 5;

console.log(y); // 15

Which is equivalent to:

y = y - 5;

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Conclusion

Operators are a fundamental part of JavaScript and are used to perform operations on values and variables. They allow developers to perform calculations, compare data, combine conditions, and assign values efficiently.

In this article, we explored the basics of JavaScript operators, including arithmetic operators for calculations, comparison operators for evaluating values, logical operators for combining conditions, and assignment operators for updating variables.

Understanding these operators is essential for writing logical and efficient JavaScript programs. As you continue learning JavaScript, you will frequently use these operators when building real-world applications