Your task, if you wish to accept it, is to write a program that outputs a non-zero number(can be integer or float). The tricky part is that if I reverse your source code, the output must be the original integer negated.
You must build a full program. That is, your output has to be printed to STDOUT.
Both the numbers must be in base 10 (outputting them in any other base or with scientific notation is forbidden).
Outputting the numbers with trailing / leading spaces is allowed.
This is code-golf, so the shortest (original) code in each language wins!
Default Loopholes apply.
Let's say your source code is
ABC and its corresponding output is
4. If I write
CBA instead and run it, the output must be