Top "Letrec" questions

A recursive let construct in e.g. Scheme whereas the "right hand side" can refer to the name being defined.

How do I use fix, and how does it work?

I was a bit confused by the documentation for fix (although I think I understand what it's supposed to do …

haskell fixpoint-combinators letrec
What are the benefits of letrec?

While reading "The Seasoned Schemer" I've begun to learn about letrec. I understand what it does (can be duplicated with …

functional-programming lisp scheme racket letrec