bios:366: [string "mine"]:76: unexpected symbol

Hello. I'm trying to create a mining program, but I keep getting this error message. Here is my program:

http://pastebin.com/3ZX0DA4X

I don't have any clue what could be going wrong here, considering I'm using correct math operators in the equation. Perhaps it's something else in the if statement or in the function that's affecting it… I don't know. I'm fairly new to programming. If anyone can help, I'd be grateful.

return is an occupied keyword for returning values of functions. Using another variable name would certainly do the job :)/>

That's a good point. I didn't think about that. Thank you! :)/>