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Start your free trialMayank Munjal
Front End Web Development Techdegree Graduate 18,120 PointsWhy do we have to call the show_help function twice?
Why do we have to call the show_help function twice? Once before the while loop and once in the loop. Why couldn't we directly call it in the while loop?
2 Answers
doesitmatter
12,885 PointsHi Mayank Munjal,
Let me first explain the code that Mr. Love uses.
show_help()
while True:
if new_item == "HELP":
show_help()
This displays all the help options when the program is launched so that the user will know what commands he can use. Then the loop starts and the user can enter a '''new_item''' if that item is HELP then it will show_help() again, if it's a new item then that will be added to the list etc.
I think what you mean is this:
while True:
show_help()
if new_item == "HELP":
show_help()
This isn't bad, but its kind of unnecessary it prints out show_help() every single time that the user is prompted to enter a new_item. So unless if you know that the person you are writing this program for has bad memory its not useful.
Felipe Lozano
2,316 Pointsthe first one is put in there because if you don't have it you go straight into the loop, so you'll see the "> " so you need to call it first, then have it a second time if the person uses the help function
Mayank Munjal
Front End Web Development Techdegree Graduate 18,120 PointsMayank Munjal
Front End Web Development Techdegree Graduate 18,120 PointsHi thanks for answering, but what I mean is it necessary to call show_help() if we're also adding it as a condition in the while loop.