Functions

Functions
- Mathematical meaning: parameters µ result
- When parameters are evaluated?
  - when used: lazy evaluation (haskell, eg: if)
  - when function is called: strict evaluation
First class values = can be given as argument & result
- arrays nor functions are first class in Pascal

Pb of visilibility can be solved with global variables, module variables, object attributes, implicit parameters (ghc)

First class values = can be given as argument & result