1 function and lists

table of contents:

1. 1.1 programs as functions
2. 1.2 types
3. 1.3 sequences (lists)
4. 1.4 script files
5. 1.5 composition of functions
6. 1.6 example most common words in a text
7. 1.7 how to read haskell expressions

exercises: 1 exercises