JavaScript Math

JavaScript Math

In JavaScript Math provides a built-in Math object to perform mathematical operations.
It is not a constructor — you use it directly: Math.method().

 Basic Math Methods

Math.round()

Rounds to the nearest integer.

Math.ceil()

Rounds up.

Math.floor()

Rounds down.

Math.trunc()

Removes decimal part.

 Power & Roots

Math.pow()

 Math.sqrt()

 Math.cbrt()

 Absolute & Sign

 Math.abs()

 Math.sign()

 Minimum & Maximum

With arrays:

 Random Numbers

Random between 0 and 1

Random between 1 and 10

Random between min and max

 Trigonometric Functions

•  Angles are in radians, not degrees.

 Logarithmic Methods

 Constants in Math

 Practical Examples

Find Area of Circle

Round Price for Billing

Generate OTP

Common Mistakes

• new Math() → invalid
•  Forgetting radians in trigonometry
•  Using Math.round() instead of Math.floor() for random numbers

Quick Summary