Slide 12 of 80
Notes:
- I see many people confused on when to put an exclamation mark in front of a variable name and when you don’t need to. Since it almost always works to code as !varname or “!varname” this becomes the standard practice. Some users find the rules to be ambiguous so they opt to use !varname. Although, I think this is unnecessary and less “attractive”, it works fine most of the time. There are, however, situations when using !varname results in difficult-to-diagnose programming bugs, which are shown in the next slide.
