Question

If I want to print function definition for a symbol, what should I do?

Answer 1

If I understand correctly, you want a function print-function such that after

(define (foo x) (cons x x))

it will behave as

> (print-function foo)
(lambda (x) (cons x x))

Standard Scheme doesn’t have a facility for that. The reason is Scheme implementations may, and generally do, compile functions into a different representation (bytecode, machine code).

Some Schemes may keep the function definition around; check your implementation’s manual.