YouTipPython3 Factorial
# Python3.x Python Factorial Example
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The factorial of an integer (English: factorial) is the product of all positive integers less than or equal to that number. The factorial of 0 is 1. That is: n! = 1 × 2 × 3 × ... × n.
## Example
#!/usr/bin/python3# Filename : test.py# author by : www..com# Calculate factorial based on user input# Get the number entered by the user num = int(input("Please enter a number: "))factorial = 1# Check if the number is negative, zero, or positive if num<0: print("Sorry, negative numbers do not have a factorial")elif num == 0: print("The factorial of 0 is 1")else: for i in range(1,num + 1): factorial = factorial*i print("The factorial of %d is %d" %(num,factorial))
Executing the above code produces the following output:
Please enter a number: 3
The factorial of 3 is 6
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