Python Programs - Factorial Program Using Recursion

In this python programming tutorial you will learn about the factorial of a number in detail with different examples.
Here we are discussing about the factorial of positive integer and zero and also we will learn about how to write python program to find out the factorial value of them using recursion.
If a function calls itself then it is called as recursive function . In recursive function there will be two part one is base case and another is recursive case. Recursive function calls itself until it meets stopping condition or base case
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[@jameswatson5707]

Thank you I spent hours trying to figure this out. This is the only video on youtube that really explains what Python is doing. Nobody else talks about how Python pauses execution during this recursion and gets back to it later. Thanks!

[@AmulsAcademy]

Thank you:)

[@taku5993]

i had this same problem cracking my head trying to understand how python does this.This pausing explanation is nowhere on the net but here.Thanks Anuls Academy.

[@domihamzala3624]

Same here with me also

[@AKA-077]

yeah same didnt get why after going down to 1 it went up to n again

[@Moktan_18]

Same here as well so thank you

[@learning2886]

no one ever explains the paused execution or the separate memory spaces. thank you.

[@tiyasha2907]

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[@AmulsAcademy]

Thank you :)

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Thank you , for this explanation. Everyone just create the program and run but they never explain how python execute it line by line like you do, I really liked your way of explanation , how python executes...thank you🙏

[@AmulsAcademy]

My Pleasure :)

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[@AmulsAcademy]

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[@AmulsAcademy]

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[@doltansenevirathne2580]

Good explanation "return n*fact(n-1)" this part. Thanks

[@AmulsAcademy]

Welcome:)

[@debojitmandal8670]

@@AmulsAcademy mam whats the difference between factorial and fact bcs factorial is an inbuilt function which can be used along with math module. but what is the function of fact i know both does the same stuffs but 2 different names for a same inbuilt function is not possible

[@christian123Grizzly]

@@debojitmandal8670 the fact function is a user-defined function not a built-in function, she is finding the answer to n! by means of recursion.

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[@AmulsAcademy]

My Pleasure :)

[@doninsalaco5018]

What a wonderful explanation! Best explanation for a very confusing procedure. Thank-you

[@AmulsAcademy]

Glad it was helpful! :)

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[@dinesh_awasthi]

Thank you very much. I watched dozens of videos but couldn't understand but this one made by concept clear. Main thing i didn't understood was how python pauses execution which you explained clearly.

[@kirtishiv9523]

Wonderful.. your dry run really explained how the code is working.. Thanks dude!

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[@GauthamHC99]

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[@AmulsAcademy]

Thank you :)

[@aswinvignesh3985]

Great explanational video that I have ever watched in recursion

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[@mharish8818]

Very Nice logic explanation in a simplified way. Just remembered college days study (Data Structure using C Language). I liked very much your way of explanation. Please make more videos on Matrices manipulation in Python.

[@AmulsAcademy]

Thank you :)

[@jayanthim2039]

I watched your previous vedios also, nice explanation everyone can understand, I think, thank you.

[@AmulsAcademy]

Glad to hear that :)

[@akshaygaikwad8949]

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[@AmulsAcademy]

It's my pleasure :)

[@gamescan34]

such a good explanation sister. I am a four-star coder on hacker rank but I never understood recursion clearly . thanks to you I got a clear idea of how it works

[@AmulsAcademy]

Pleasure 😊❤️

[@varshadustakar5805]

Pausing explanation in this topic helpd me a lot thanks alot mam

[@priyanshukasaudhan786]

thx so much i am trying to get this for 2days now i get the concept

[@AmulsAcademy]

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[@AKASH._._.]

Excellent Explanation sister Thanks

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Thank you mam for your for teaching python from it's core.🙏

[@AmulsAcademy]

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Thank you Amuls Academy..

[@AmulsAcademy]

Welcome :)

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Super explaination on intuition behind recurssion.

[@AmulsAcademy]

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[@AmulsAcademy]

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[@error4031]

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[@AmulsAcademy]

My pleasure :)

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Thank you so much 🙏

[@mrinalmishra8444]

In the if condition you can also write if n==0 or n==1, return 1

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[@AmulsAcademy]

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thanks amulya mam

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[@AmulsAcademy]

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Very well explained especially how python pause and resume it internally. Keep doing good work. Thanks...

[@AmulsAcademy]

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[@AmulsAcademy]

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[@AmulsAcademy]

Thank you :)

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How to build good logic and how to know these hidden steps and loops and control like you.... have

[@s2613]

Hey, Amulya Can you please do some more examples on recursive function

[@AmulsAcademy]

Yes i will do soon :)

[@s2613]

Amuls Academy Thanks ☺️

[@raashidhussain5559]

Ma'am, what if I give a negative number as input ????

[@ashu60071]

could you please show how to convert string of array into integer of array in missing number problem

[@AmulsAcademy]

I will try :)

[@pasindum2019]

I had set recursion limit to 10(to print "hello"), but it prints only 4 times and got some errors.. can you help me to fix them..?

[@AmulsAcademy]

Give me the program please :)

[@pasindum2019]

@@AmulsAcademy Import sys sys.setrecursionlimit(10) def hello(): Print("hello") Hello() Hello()

[@sathya_krish]

print ("Thank you So much") 😁

[@AmulsAcademy]

Welcome 😊

[@manipalreddy1458]

👏🏻

[@chandrasekhar483]

I think the following code will be enough to print the factorial of given number isn't it. Just asking. n=int(input("enter any number")) def fact(n): print("The factorial of given number",n,"is",n*fact(n-1))

[@KishoreKumar-zh9jf]

Thank you darling...👌

[@RagHelen]

For n somewhere between 900 and 1000 it cracks down: "RecursionError: maximum recursion depth exceeded in comparison"-

[@AmulsAcademy]

Hi In python Maximum recursion depth is 1000 You can check that using import sys sys.getrecursionlimit() if you want you can set the recursion limit using import sys sys.setrecursionlimit(2000) Or you can use iterative method. Thank you:)

[@Ankit-mq6em]

How you learn python can u suggest some good best resources please ???

[@shyamprakash3665]

What is base case & recursive case

[@AmulsAcademy]

A base case is a case, where the problem can be solved without further recursion. This is the stopping condition. recursive case contains recursive condition. :)

[@hardikvegad3508]

def fact(n): fact = 1 for i in range(1,n+1): fact = fact*i return fact fact(5)

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Any GitHub for this tutorials?

[@AmulsAcademy]

NO:)

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[@AmulsAcademy]

Showing any error ?

[@mathomegalaxyfanclub6985]

@@AmulsAcademy its not error in actual but showing wrong output

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your voice

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su

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Thank you

[@AmulsAcademy]

You're welcome :)