In the last article,we learnt about** iota** which is a** complex number** equal to . Now, can we find power of iota () when n is any whole number. Lets simply calculate some of them and then I will define some general rule.

## What is a Complex Number?

Any number which can be converted or written in the form , is a **complex number. **Here are real numbers and (also called **iota**) is equal to .

here is called the real part of complex number and is called the imaginary part of complex number.