# How to know if a number is a perfect square?

A perfect square is a number that is expressed as a product of two equal integers.

## Answer: A number is a perfect square if it is obtained by squaring a whole number or an integer.

Let's understand this with the help of an example.

**Explanation:**

If N is the perfect square of a whole number X, then it can be written as N = X^{2}

Example: 9 is the square of 3 and is represented as 3^{2} or 3 × 3 = 9

Here, 9 is known as a perfect square.