Real and imaginary parts of a complex number

### 7.4.2 Real and imaginary parts of a complex number

The re (or real) and im (or imag) commands find the real and imaginary parts of a complex number.

- re takes a, a complex number (or point).
- re(a) returns the real part of the complex number a (or the projection of the point a onto the x axis).
- im takes a, a complex number (or point).
- im(a) returns the imaginary part of the complex number a (or the projection of the point a onto the y axis).

#### Examples

re(3+4*i)

3 |  |  |  |  |  |  |  |  |  |

im(3+4*i)

4 |  |  |  |  |  |  |  |  |  |