Example 1: python calculate factorial
def factorial(n):
fact = 1
for num in range(2, n + 1):
fact = fact * num
return(fact)
Example 2: factorial in python
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
n=int(input("Input a number to compute the factiorial : "))
print(factorial(n))
Example 3: Find faculty of a number python
#Assumes n is possitive
def factorial(n):
return 1 if n <=1 else n*factorial(n-1)
Example 4: algorithm for factorial in python
def factorial(n):
for x in range(n-1,0,-1):
n = n*x
if n == 0: return 1
if n < 0 : return False
return n
factorial(5) # returns 120
####### lambda Factorial ########
factorial = lambda n: n*factorial(n-1) if n > 0 else 1
#OR
factorial = lambda n: n>0 and n*factorial(n-1) or 1
######### Recursion ##########
def factorial(n):
if n <= 0: return 1
else: return n * factorial(n-1)
# Do not use big number XD
Example 5: factorial in python using for loop
# change the value for a different result
num = int(input('enter a number'))
# To take input from the user
#num = int(input("Enter a number: "))
factorial = 1
# check if the number is negative, positive or zero
if num < 0:
print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
print("The factorial of 0 is 1")
else:
for i in range(1,num + 1):
factorial = factorial*i
print("The factorial of",num,"is",factorial)
Example 6: factorial in python
def fact(n):
return 1 if (n==0 or n==1) else n*fact(n-1)
fact(3)
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