- `X = real (Z)``

Return the real part of `Z`.

See also: `imag`, `conj`.

### References

- https://www.mathworks.com/help/matlab/ref/real.html
- https://octave.sourceforge.io/octave/function/real.html
- https://mathworld.wolfram.com/RealNumber.html
- https://en.wikipedia.org/wiki/Real_number