Compound assignment and ++ / --
Also written: +=, -=, *=, ++, --, increment
Shortcuts that change a variable in place: `bags += 5` means `bags = bags + 5`, `bags++` adds 1 and `bags--` takes 1 away.
Also written: +=, -=, *=, ++, --, increment
Shortcuts that change a variable in place: `bags += 5` means `bags = bags + 5`, `bags++` adds 1 and `bags--` takes 1 away.