Possibly ignoring ~=?

I'm trying to make a simple program where a mining turtle will take user input and dig a rectangular prism of that size. It gets one layer done, doesn't return to its starting position and digs the wrong way. I think its not working on the line with if s~=x. I had the program print the values of s and x before it compared them and even when they are the same it still does what is in the if statement. Any help would be greatly appreciated.

Here is the code:
https://drive.google...blNPV3h2WWxuc2c

s is a number, x is a string. Try "tonumber(read())".