def jchs(n):
s = 1
for i in range(1, n+1):
s *= i
return s
n = eval(input("请输入一个整数:"))
print(n, "的阶乘是:", jchs(n))
name = "阳光"
age = 18
info = """ ------- information of {name} -------
"Name:" {name}
"Age:" {age}
-------all of his infomations-------
""" .format(name=name,age=age)