Python Factorial Example
Python3 ExamplesThe factorial of an integer (English: factorial) is the product of all positive integers less than or equal to the number, and the factorial of 0 is 1. That is: n! = 1×2×3×...×n.
Example
#!/usr/bin/python3
# Filename : test.py
# author by : www.example.com
# Calculate factorial by taking user input number
# Get the number entered by the user
num = int(input("Please enter a number:"))
factorial = 1
# Check if the number is negative, 0, or positive
if num < 0:
print("Sorry, negative numbers have no 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))
The output after executing the above code is:
请输入一个数字: 3 3 的阶乘为 6Other Extensions