Revision of Programming.

Revision of Programming.

1. programming is providing instructions to a computer to solve a problem

   • programming

2. penup() and pendown()

   • penup() tells the turtle to stop drawing, so it can be moved about without leaving line
   • pendown() tells the tuptle to start drawing, so lines can be created.

3. pencolor()

   • pencolor() can be used to change the color of the line that is drawn by the turtle.

4. pattern recognition

   • One of the principals of computational thinking is pattern recognition.
   • If we can spot a repeating pattern in our code their is usually a way to make it more efficient

5. loop

   • When we spot a repeating pattern, we can use a loop to make the code repeat, rather than typing it out multiple times.

6. proceduce

   • the code would be much simpler if we could simply tell it to "draw a pentagon" instead of typing out the loop every time
   • we can define a procedure called drawpentagon, then use it whenever we want to draw one

7. fillcolor()

   • to fill a shape you need to write fillcolor() with your chosen colour and then begin_fill() to start the fill. Once the shape is draw write end_fill().