This project compiles a tiny subset of scheme to C, the point is

1. lowering let to begin (set! ...)
2. remove complex operands from if
3. simplify expression in set!, C won't accept (if ...) and (begin ...) (block is not a value in C, unlike Scala or Rust). This step also about control flow, set! be seen as a statement, not an expression
4. explicate control flow by forwarding return statement

1. A Low-Level Look at A-Normal Form: https://www.williamjbowman.com/resources/wjb2024-anf-is-dead.pdf