python第二十课——math模块中常用的函数

import math

#属性:e和pi
print(math.e)
print(math.pi)

#函数：
#ceil(),floot():
print(math.ceil(3.14))
print(math.floor(3.14))
print(math.ceil(-3.14))
print(math.floor(-3.14))

#radians(),degrees()
print(math.radians(180)) #3.141592653589793
print(math.radians(360)) #6.283185307179586
print(math.degrees(6.283185307179586))

import sys
print(sys.argv)

import os
print(os.system('ipconfig'))
print(os.system('dir'))
print(os.system('cls'))