How to Design Programs Quotes

“Every reader of your program should understand what your functions compute without having to read the function itself. A multi-function program should also come with a purpose statement. Indeed, good programmers write two purpose statements: one for the reader who may have to modify the code and another one for the person who wishes to use the program but not read it.”
― Matthias Felleisen, How to Design Programs: An Introduction to Programming and Computing