How to make a var positive?

I kinda forgot how to make a number positive in lua. Since i don’t know if the var containing an integer will be positive or negative i can’t just multiply by -1 and i also can’t do if var < 0 then.

**[Math.abs

http://wiki.garrysmod.com/favicon.ico](http://wiki.garrysmod.com/?title=Math.abs)**

thanks.