Translating Algorithm

Translating algorithm to Python Code

How to implement?
We will use a website called https://repl.it to implement algorithms

• The turtle library has built-in commands that make it easy to draw an object.
• To access a library in Python, you need to use the keyword import.
• For example, if you want to draw a line with length 100 points, you can simply use the command forward(100).

•                 import turtle as t
                  t.forward(100)
                  t.left(90)
                  t.forward(100)
              

• 

Example-1

Algorithm

         Python code
         1. import turtle as t
         2. t.forward(100)
         3. t.left(90)
         4. t.forward(100)
         5. t.left(90)
         6. t.forward(100)
         7. t.left(90)
         8. t.forward(100)
         9. t.left(5)
     

Repetition

         import turtle as t
         for i in range(4):
            t.forward(100)
            t.left(90)
     

Repetition using: for counter in range(start, end): [list of instructions]

         import turtle as t
         for i in range(1,5):
            t.forward(100)
            t.left(90)
     

Some turtle commands

Drawing a circle

• Syntax: turtle.circle(radius, extent = None, steps = None)
• radius is the radius of the circle
• extent – an angle – determines which part of the circle is drawn. If extent is not given, draw the entire circle. If extent is not a full circle, one endpoint of the arc is the current pen position.
• steps determines the number of steps to use
• Draw the arc in counterclockwise direction if radius is positive, otherwise in clockwise direction.

Example of drawing a circle

         import turtle as t
         t.circle(50) 
         t.circle(50,180) 
         t.circle(50,180,4) 
     

fillcolor ( colorName )

• Fills a closed shape with a color
• Should be used with begin_fill() and end_fill()
• Example:

1. t.fillcolor("red")
2. t.begin_fill&;#40&;#41
3. t.circle&;#40 50&;#41
4. t.end_fill&;#40&;#41