Hi,

Welcome to the forum. The operators "*/" and "//" can be found in the 'Math Operators' section of the PBP manual.

http://melabs.com/resources/pbpmanual/

Now, about your other questions, many of us don't have the good habit of writing a good comment after every line of code. So, I am not sure what the programmer wanted to do there. Maybe somebody else here has a better answer.

Robert