python program for factorial of a number 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

def fact(n):
  return 1 if (n==0 or n==1) else n*fact(n-1)
fact(3)

Example 6: quick way to find the factor of a number python

def factors(x):
  listOfFactors = []
  for i in range(1, int(x ** 0.5)):   
    # Use a loop from 1 to the square root of x for more speed.
    if x % i == 0:
      listOfFactors.append(x)
      listOfFactors.append(i)
    # May repeat some numbers. Further code would be needed to fix that.
    print(i)