Python Program to Find the Factorial of a Number

In this python tutorial, you will learn how to write a Python program to calculate the factorial of a number.

Prerequisite topics to create this program.

• Python Input, Output
• Python Data types
• Python Type Conversion
• Python For loop
• Python if…else
• Python Arithmetic Operator

Steps

• First, we will ask the user to enter a number
• Using the int() function we will convert the entered number into an integer value.
• Using the for loop we will go through each value from 1 to the entered number and multiply each one.

Python Program to Find the Factorial of a Number:

Code:

num =int(input("Enter a Number: "))
fact=1
for i in range(1,num+1):
    fact*=i
if num==0:
    print("The factorial is 1")
else:
    print("The factorial of",num,"is",fact)

Output 1:

Enter a Number: 12
The factorial of 12 is 479001600

Output 2:

Enter a Number: 5
The factorial of 5 is 120

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