How to play factorial in python?
The factorial of an integer (English: factorial) is the product of all positive integers less than and equal to the number. The factorial of 0 is 1. That is: n!=1×2×3×...×n.
Example
#!/usr/bin/python3
# Filename : test.py
# author by : www.runoob.com
# 通过用户输入数字计算阶乘
# 获取用户输入的数字
num = int(input("请输入一个数字: "))
factorial = 1
# 查看数字是负数，0 或 正数
if num < 0:
print("抱歉，负数没有阶乘")
elif num == 0:
print("0 的阶乘为 1")
else:
for i in range(1,num + 1):
factorial = factorial*i
print("%d 的阶乘为 %d" %(num,factorial))The output result of executing the above code is:
请输入一个数字: 3 3 的阶乘为 6
Related recommendations: "Python Tutorial"
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