Operators in JavaScript

 Got it! Let's move on to Operators in JavaScript. Operators are special symbols used to perform operations on values and variables.

➕ Arithmetic Operators

These are used for performing mathematical calculations:

Operator	Name	Description	Example	Result
+	Addition	Adds two numbers.	10 + 5	15
-	Subtraction	Subtracts the right operand from the left.	10 - 5	5
*	Multiplication	Multiplies two numbers.	10 * 5	50
/	Division	Divides the left operand by the right.	10 / 5	2
%	Modulus	Returns the remainder of a division.	10 % 3	1
**	Exponentiation	Raises the first operand to the power of the second.	2 ** 3	8

Special Case: String Concatenation

The + operator also joins strings together (called concatenation):

const firstName = "John";

const lastName = "Doe";

const fullName = firstName + " " + lastName; // Result: "John Doe"

🏷️ Assignment Operators

These are used to assign values to variables. The most basic is the = sign, but there are shorthand versions:

Operator	Example	Equivalent to
=	x = 5	x = 5 (Simple assignment)
+=	x += 3	x = x + 3
-=	x -= 2	x = x - 2
*=	x *= 4	x = x * 4
/=	x /= 2	x = x / 2

⚖️ Comparison Operators

These are used to compare two values and always return a Boolean value (true or false). These are crucial for making decisions in your code (which we'll cover with if statements next!).

Operator	Name	Description	Example	Result
==	Equal to	Checks if two values are equal (ignores type).	5 == '5'	true
===	Strict Equal	Checks if two values are equal and have the same type. (Always use this!)	5 === '5'	false
!=	Not Equal	Checks if values are not equal (ignores type).	5 != 8	true
!==	Strict Not Equal	Checks if values are not equal or not of the same type. (Always use this!)	5 !== '5'	true
>	Greater Than	Returns true if the left value is greater than the right value.	10 > 5	true
<	Less Than	Returns true if the left value is less than the right value.	10 < 5	false
>=	Greater Than or Equal To	Returns true if the left value is greater than or equal to the right value.	10 >= 10	true
<=	Less Than or Equal To	Returns true if the left value is less than or equal to the right value.	10 <= 9	false

💡 Important Note: The Strict Comparison Operators (=== and !==) are best practice in JavaScript because they prevent unexpected type-coercion issues.

🧠 Logical Operators

These are used to combine multiple Boolean conditions.

Operator	Name	Description	Example
&&	AND	Returns true if both conditions are true.	(5 > 3) && (2 < 4) → true
`		`	OR
!	NOT	Reverses the boolean result.	!true → false