Pre/Post Increment & Decrement

"Use it, THEN change it"
The ++ / -- comes AFTER the variable,
so the change happens AFTER the value is used.
Think: "I'll deal with it later"

"Change it, THEN use it"
The ++ / -- comes BEFORE the variable,
so the change happens BEFORE the value is used.
Think: "Change first, ask questions later"

When used alone on its own line,
x++ and ++x do the exact same thing.
The difference only matters in expressions like y = x++