Python练习

print(‘hello world!‘)

name = input("输入姓名：")
print("{}同学，学好Python，前途无量！".format(name))

a = float(input(‘输入第一个数字：‘))
b = float(input(‘输入第二个数字：‘))
s = a+b
print(s)

x = float(input(‘输入第一条边:‘))
y = float(input(‘输入第二条边:‘))
z = float(input(‘输入第三条边:‘))
p = float((x+y+z)*0.5)
s = float((p*(p-x)*(p-y)*(p-z))**0.5)
print(‘面积是;{0}‘.format(s))

r = 25
area = 3.1415 * r * r
print(area)
print("{:.2f}".format(area))

import turtle
turtle.pensize(2)
turtle.circle(10)
turtle.circle(40)
turtle.circle(80)
turtle.circle(160)

import turtle
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)

import turtle
turtle.color(‘yellow‘)
turtle.fillcolor(‘yellow‘)
turtle.begin_fill()
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.end_fill()