You can understand a log about different programming paradigms from the way in which they implement 1 + 1:

• In imperative languages, such as C, it is just 1 + 1 - arithmetics is build in.
• In object-oriented languages like Smalltalk and Ruby, it is 1.+(1) - plus is a method of the object 1.
• In functional languages, like Haskell, it is actually +(1, 1) - plus is an inflix operator, which is actually a function. In Lisp you just cannot write (+ 1 1) directly.