- `N = nargout ()`
- `N = nargout (FCN)`

Return the number of output arguments requested from the current function, or
the declared number of output arguments for function `FCN`.

For functions with variable output arguments, the returned value may be
negative.

See also: `nargin`, `nargoutchk`.

### References

- https://www.mathworks.com/help/matlab/ref/nargout.html
- https://octave.sourceforge.io/octave/function/nargout.html