Imaginary numbers

However, Real numbers does not include imaginary numbers.

Numbers can be classified in to two parts

1.Real numbers
2.Imaginary numbers

Imaginary numbers - Consider a number (-16)^1/2. The roots of (-16)^1/2 are +4i or -4i where i stands for an imaginary number.

Real numbers can be shown on number line. Number line shows the positive or negative real numbers.