Python Program to Find Factorial of a Number

Q. Write a Python program to take input of a number and find the factorial of that number.

Example:

A sample Python program to calculate factorial of a given number. You can also take input of a number from user and calculate the factorial.

# Initialize a number
num = 5

# Uncomment below to take input from user
#num = int(input("Enter a number: "))

fact = 1

if num < 0:
   print("Sorry, factorial does not exist for a negative number")
elif num == 0:
   print("The factorial of 0 is 1")
else:
   for i in range(1, num + 1):
       fact = fact*i
   print("The factorial of", num, "is", fact)

# Initialize a number

num = 5

# Uncomment below to take input from user

#num = int(input("Enter a number: "))

fact = 1

if num < 0:

print("Sorry, factorial does not exist for a negative number")

elif num == 0:

print("The factorial of 0 is 1")

else:

for i in range(1, num + 1):

fact = fact*i

print("The factorial of", num, "is", fact)

Output:

The factorial of 5 is 120

Python