It's called a procedural language for a reason :)

Something that doesn't return a value shouldn't be called a "function", that's just a C-ism. And curly braces are ugly! </troll>

Integers, enums and chars are all so-called "ordinal" types. They have consecutive values with a lower and upper bound, that's why they can all be used as array indexes or in sets (floating-point numbers can't, nor could enums with gaps, if they existed).

Ranges aren't used just for array bounds. I think it's really elegant how the usual "0 .. len-1" is actually an anonymous subtype of integer, not some special syntax for declaring arrays.