Python input and output exercises, arithmetic exercises, turtle preliminary exercises

1.Hello world!

1	print(‘Hello World!‘)

Simple interaction (Interactive, file-style)

1 name=input (' Please put your name: ') 2 print (' Hi {} '. Format (name)) 3 print (' Mr. {} hobbit is eating, sleeping, hitting peas '. Format (Name[0])) 4 Print (' Dear {} should go to work! '. Format (name[1]))

3. The user enters two numbers and calculates and outputs the sum of two digits:

Print (' Sub is:{} '. Format (float (input (' first number: ')) +float (input (' second number: ')))

4. User input triangle three-side length, and calculate the area of the triangle: (Helen Formula)

1 a=input (' Please enter first edge: ') 2 b=input (' Please enter second edge: ') 3 c=input ("Please enter third side:") 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))) **0.56 print (' The area of the triangle is {} '. Format (S))

5. Enter a radius to calculate the area of the circle.

R=input (' Please input r: ') Area=3.1415*float (R) *float (r) print ("{:. 2f}". Format (area))

6. Draw a set of identical tangent circles

1 Import turtle2 turtle.pensize (Ten) 3 turtle.circle (4) turtle.circle (+) 5 turtle.circle (+) 6 turtle.circle (120)

7. Draw a Pentagram

1 Import turtle as T 2 t.speed (1) 3 for I in range (5): 4     T.forward (+) 5     t.right (144)

8. Draw a All-yellow pentagram

1 Import Turtle 2 turtle.color (' Yellow ') 3 turtle.fillcolor (' Yellow ') 4 turtle.speed (1) 5 turtle.pensize (Ten) 6 Turtle.begi N_fill () 7 for I in range (5): 8     Turtle.forward () 9     turtle.right (144) Turtle.end_fill ()

Additional question 1: Draw a set of concentric circles:

1 Import Turtle 2 Turtle.penup () 3 Turtle.goto (0,-100) 4 Turtle.pendown () 5 turtle.circle (+) 6 turtle.penup () 7 turtle.g Oto (0,-80) 8 Turtle.pendown () 9 turtle.circle ($) turtle.penup () Turtle.goto (0,-60) Turtle.pendown () 13 Turtle.circle () Turtle.penup () Turtle.goto (0,-40) Turtle.pendown () turtle.circle (40)

Draw five pentagram on the national flag

Import Turtle
Def draw_square ():
Turtle.color (' Red ')
Turtle.fillcolor (' Red ')
# turtle.speed (1)
Turtle.penup ()
Turtle.goto (-200,200)
Turtle.pendown ()
Turtle.begin_fill ()
Turtle.forward (400)
Turtle.right (90)
Turtle.forward (200)
Turtle.right (90)
Turtle.forward (400)
Turtle.right (90)
Turtle.forward (200)
Turtle.right (90)
Turtle.end_fill ()
# Time.sleep (5)
Def Draw_big_star ():
Turtle.color (' Yellow ')
Turtle.fillcolor (' Yellow ')
# turtle.speed (1)
Turtle.penup ()
Turtle.goto (-175,155)
Turtle.pendown ()
Turtle.begin_fill ()
For I in range (5):
Turtle.forward (50)
Turtle.right (144)
Turtle.end_fill ()
def draw_smallstar (x, Y, z):
Turtle.color (' Yellow ')
Turtle.fillcolor (' Yellow ')
# turtle.speed (1)
Turtle.penup ()
Turtle.goto (x, y)
Turtle.pendown ()
Turtle.begin_fill ()
Turtle.right (z)
For I in range (5):
Turtle.forward (15)
Turtle.right (144)
Turtle.end_fill ()
Draw_square ()
Draw_big_star ()
Draw_smallstar ( -110,175,5)
Draw_smallstar ( -90,155,15)
Draw_smallstar ( -95,125,25)
Draw_smallstar ( -110,105,0)

Python input and output exercises, arithmetic exercises, turtle preliminary exercises