Comment on Why does the for loop repeat in this recursion?
milon@lemm.ee 1 year agoI see. I guess my understanding was that the recursion was over after the recursive call, but it’s actually for all the code in draw().
Comment on Why does the for loop repeat in this recursion?
milon@lemm.ee 1 year agoI see. I guess my understanding was that the recursion was over after the recursive call, but it’s actually for all the code in draw().
Merwyn@sh.itjust.works 1 year ago
Yes, to better understand this you have to understand the “flow” of the program. Meaning the order at which the instructions are executed and not written.
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Here you have the flow of the program starting from n =3 until the recursion reach draw(0), note that none of the for loop have been executed yet. At this point it reach the first “return” instruction and go finish the call to draw(0).
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Then the flow go back to where it previously was: inside the draw(1) call just after the line calling draw(0). And it start executing the next lines of the draw(1): the for loop.
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Then it reach the second “return” and proceed again until the whole program is over.
milon@lemm.ee 1 year ago
Yes, that helps. Thanks. I see now how n goes from 1 to 2 to 3…etc. Now not so sure how i = 1 when the for loop starts.
Merwyn@sh.itjust.works 1 year ago
When called with n=1 ? It’s from i=0 to i<1, so it will do only one iteration with i=0 and print one #.