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
Drawing a square in Python - turtle Size of each side = 100 dots- 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]
This loop, repeats [list of instructions] from counter = start until end - 1
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:
- t.fillcolor("red")
- t.begin_fill&;#40&;#41
- t.circle&;#40 50&;#41
- t.end_fill&;#40&;#41
