Python练习

print(‘Hello world‘)
Hello world

1 name = input("请输入姓名：")
2 print("{}同学，学好Python，前途无量！".format(name))
3 print("{}大侠，学好Python，大展拳脚！".format(name[0]))
4 print("{}哥哥，学好Python，人见人爱！".format(name[1:]))

1 n1=input("请输入第一个数字：")
2 n2=input("请输入第二个数字：")
3 sum0=float(n1)+float(n2)
4 print("两个数字之和为：{}".format(sum0))

1 a=input(‘请输入第一条边：‘)
2 b=input(‘请输入第二条边：‘)
3 c=input("请输入第三条边：")
4 C=(float(a)+float(b)+float(c))
5 S=(C/2*(float(C/2)-float(a))*(float(C/2)-float(b))*(float(C/2)-float(c)))**0.5
6 print(‘三角形的面积是{}‘.format(S))

1 radius=float(input("请输入半径："))
2 area=float(3.1415926535898*radius*radius)
3 print("圆面积约为:{:.2f}".format(area))

import turtle
turtle.pensize(3)
turtle.circle(10)
turtle.circle(30)
turtle.circle(60)
turtle.circle(90)
turtle.circle(120)

import turtle
turtle.forward(100)
turtle.left(144)
turtle.forward(100)
turtle.left(144)
turtle.forward(100)
turtle.left(144)
turtle.forward(100)
turtle.left(144)
turtle.forward(100)

import turtle
turtle.color(‘yellow‘)
turtle.fillcolor(‘yellow‘)
turtle.speed(1)
turtle.pensize(10)
turtle.begin_fill()
for i in range(5):
    turtle.forward(200)
    turtle.right(144)
turtle.end_fill()