This document provides a Python code to calculate factorials and explains the concept. It defines a factorial as the product of all positive integers less than or equal to a given number. A factorial Python code is presented that uses an if/else statement and for loop to calculate the factorial of a user-input number. The code returns the step-by-step results in a pyramid format.

1. Created by varsha
“If this program turns out helpful to you please let me know in
the comments.”

2. What you should know?
Concept of factorials
If else concept
Basic knowledge of python code

3. Factorials: Concept
 The factorial of a positive number is the product of all
numbers less than or equal to it. So…
1! = 1
2! = 1 x 2
3! = 1 x 2 x 3
4! = 1 x 2 x 3 x 4
....
100! = 1 x 2 x 3 x 4 .... 100

4. Python code for factorial of a no:

5. Notes about code:
 “Number” is my variable for storing user’s value.
 Similarly “factorial” is also a variable
 Nested if condition is used to save time
 For condition is similar to the code in C or C++ for
factorial i.e. its easy
 In the end you get a pyramid cause computer prints all
the trials and the bottom one is the answer.

6. Results: