突然想学Python了，今天开始学习，编出了我的第一个Python程序
#calculate the area and circumference of a circle from its radius
import math
radiusString =input("Enter the radius of your circle:")
radiusInteger =int(radiusString)
circumference=2*math.pi*radiusInteger
area=math.pi*(radiusInteger**2)
print ("The cirumference is:%.2f,and the area is:%.2f"%(circumference,area))
