factorial program in python code example

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)