圆的面积
import math radius = 25 area = math.pi*radius*radius print(area) print("{:.2f}".format(area))
输入
name = input("输入人名:") print("{}".format(name)) print("{}".format(name[0])) print("{}".format(name[1:]))
斐波那契
a , b = 1,1 while a < 1000 : print(a,end=',') a, b = b,a+b print("")
同心圆
import turtle turtle.pensize(2) turtle.circle(10) turtle.circle(20)
日期与时间
from datetime import datetime now = datetime.now() print(now) print(now.strftime("%x")) print(now.strftime("%X"))
习题部分