- Most recent answer: `ans`

The most recently computed result that was not explicitly assigned to a
variable.

For example, after the expression

> > `3^2 + 4^2`

is evaluated, the value returned by `ans` is `%25%`.

### References

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