&& and || in Bash if statements.

I had a hard time figuring out how this worked in Bash so I thought I'd add it.
The code works for me, but I'm quite new to Bash scripting so if there's something that should be done differently, let me know.

Also, I wasn't sure whether to put my chunk directly after the if statement or not. I chose to put it after the "conditional execution"-part because it introduces && and ||.