- `C = plus(A, B)`
- `C = plus (A1, A2, ...)`

This function and `A + B` are equivalent.

If more arguments are given, the summation is applied cumulatively from left to
right:

`(...((A1 + A2) + A3) + ...)`

See also: `minus`, `uplus`.

### References

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