write a program to find factorial of a number in python code example

Example 1: factorial python for loop

#Factorial 
'''factorial n! - n* n-1*n-2..1'''

def fac_iterative_method(n):
    fac = 1
    for i in range(n):
        fac = (fac * (i+1))
        print('fac of',i+1,'=',fac)
        
number = int(input('enter the number'))
fac_iterative_method(number)

Example 2: python calculate factorial

def factorial(n):
    fact = 1
    for num in range(2, n + 1):
        fact = fact * num
    return(fact)

Example 3: factorial in python

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

Example 4: 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)