Factorial CHALLANGE

Question

Hi!
This challenge is about factorial operation.
This is then your number starting multiply it self from one to it self. like:
5! = 1*2*3*4*5 = 120
or
6! = 1*2*3*4*5*6 = 720
Write a calculator or something like i did in other languages.
https://code.sololearn.com/Wo2A2Zg0cFMP/?ref=app

Answer 1

Recursive Lambda
https://code.sololearn.com/cb60vmKFbNLk/?ref=app
Non-Recursive
https://code.sololearn.com/cspGL8hL6tQk/?ref=app
Non-Recursive Lambda with eval (oneliner) ***BEST***
https://code.sololearn.com/cTL9Erz40lhW/?ref=app

Answer 2

https://code.sololearn.com/cPPGIaXLb8e7/?ref=app

Answer 3

https://code.sololearn.com/cKZcce9eWm3c/?ref=app

Answer 4

https://code.sololearn.com/cha99rgulGmE/?ref=app

Answer 5

https://code.sololearn.com/cT5eBID3o6Gn/?ref=app

Answer 6

https://code.sololearn.com/cp1UNm7yaxMu/?ref=app

Answer 7

https://code.sololearn.com/cyx312A2q71R/?ref=app

Answer 8

Here!!
https://code.sololearn.com/c5ss4Ey3W2DN/?ref=app

Answer 9

https://code.sololearn.com/c9U7NM6WT8q4/?ref=app

Answer 10

https://code.sololearn.com/cNQ149MaJKfb/?ref=app

Answer 11

https://code.sololearn.com/cu8uHv5XB2RR/?ref=app

Answer 12

https://code.sololearn.com/c19AAubq4m9W/?ref=app

Answer 13

https://code.sololearn.com/ceaw76y9q4jz/?ref=app

Answer 14

Ruby:
(1..n).inject(:*) || 1
https://code.sololearn.com/cJXhhv3Thov2/
edit: code has been corrected so it also returns the right answer when negative numbers are given

Answer 15

https://code.sololearn.com/Wxk7KL58inWk/?ref=app

Answer 16

my try :)
https://code.sololearn.com/cV9p8IOnjtCM/
EDIT:
V2 different approach, sould be much faster :)
https://code.sololearn.com/chgx5Y8uV971/

Answer 17

Most simply:
from math import factorial
print(factorial(int(input())))
Or written out for clarity, a recursive function:
Simple Factorial
https://code.sololearn.com/cwiswHNQz0lE/?ref=app
Remember that 0! = 1 and negative factorial is undefined. Many of the other programs return these two conditions incorrectly.

Answer 18

https://code.sololearn.com/cDO15j6FTfpn/?ref=app

Answer 19

https://code.sololearn.com/cghCd97518YH/?ref=app

Answer 20

https://code.sololearn.com/cl86DxFZLTMj