Owk, 513 bytes
ThisOwk is written in my re-implementationan abandoned language created by Phase.
a:λx.λy.x+y
Owk does not support input, so the input will be hard-coded in its character form. However, the natural numbers must not be larger than 255 (as in the spec). (ThisThis is not truewritten in my re-implementation.)
In order to represent negative numbers, you negatean unofficial fork(-
but it's shorter) them. E.g. -'A
:
a=<input1>+<input2>
.a:x+y