# Is pi a rational or irrational number?

Irrational Numbers are those numbers that cannot be expressed in the form of p/q where p and q are integers and q ≠ 0. Also, the decimal expansion of an irrational number is neither terminating nor repeating.

## Answer: Yes, pi is an irrational number.

Let us know whether 'pi' is a rational or an irrational number.

**Explanation:**

Pi is a Greek letter (π), and one of the most well-known mathematical constants.

It is the ratio of a circle's circumference to its diameter which is always constant.

pi (π) approximately equals 3.14159265359... and is a non-terminating non-repeating decimal number.

Hence 'pi' is an irrational number.