I had good results with my students with the illustrated video explanation I made [1]. It thinks of running functions as boxes that produce output, and of funct

I had good results with my students with the illustrated video explanation I made [1]. It thinks of running functions as boxes that produce output, and of function definitions as box blueprints. [1] https://www.youtube.com/watch?v=vLhHyGTkjCs https://www.youtube.com/watch?v=vLhHyGTkjCs