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

Source: Internet
Author: User

1. Hello world!
1. Print ('helloWorld')

2. Simple Interactive (interactive, file-style) textbook P19
1. Name=input ('name=')print('{} Shi ver handsome  '. Format (name)

3. the user enters two numbers, calculates and outputs two digits of the sum:
1.  a=input ( " a=   " ) b  =input ( " b=   " ) s  =float (a) +float (b)  print  ( " {}  "  . Format (s))

4. the user enters a triangular three-edged length and calculates the area of the triangle: (Helen Formula)
1.  a=float (input ( "  first edge:  "   =float ( Input ( "  second side length:   "  =float (input ( "  third side length:   " )) s  = (a+b+c)/2area  = (s* (s-a) * (s-b) * (S-C) ) **0.5print  ( "   "%area)

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

6. Draw a set of identical tangent circles
1. Import turtleturtle.circle (8) turtle.circle(+) turtle.circle(+)turtle.circle ( 64)

7. Draw a Pentagram
1. Import Turtleturtle.begin_fill ()  for  in range (5):    turtle.forward (    turtle.left) (144) Turtle.end_fill ()

8. Draw an all-yellow pentagram

Import Turtleturtle.begin_fill ()  for  in range (5):    turtle.forward (    turtle.left) (144) Turtle.end_ Fill ()

Thinking:

1. Draw a set of concentric circles.

2. Draw five pentagram on the national flag.

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

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