1. Computer Programming

2. Important concepts Looping (repeat statement) Named procedures
Parameter passing
Now we will use these ideas in a more complex problem

3. Looping, procedures, parameter passing
Consider what procedures you might find useful by trying to identify the repeating patterns
How can you use parameter passing to vary the size of the chess board?

4. Google Sites Create site Blank template URL = username_cp
Make Logo page
Create three subpages:
looping
parameter passing
procedures
An image
Some code
Some explanatory text

5. More complex patterns Useful commands: setpencolor [rrr ggg bbb]
setfloodcolor [rrr ggg bbb]
fill

6. Next Tuesday Add to your calendar
Quick quiz coming up
Next Tuesday Add to your calendar
REPEAT statement
Creating subprocedures
Passing parameters
Knowledge and Understanding
Reading and interpreting code
Application
Writing code
Communication
Defining terms, explaining approach and concepts, etc

7. Examples
The following Logo commands create the shape shown but some of the commands are missing. Write down the missing commands. [5 marks]
fd 100
rt 90
fd 50 …
lt 90
fd 150
Define the term procedure. [1 mark]
Give two advantages of using procedures in computer programming. [2 marks]
Write code to draw the following pattern in Logo. You will gain points for correct code and for using a sensible approach. [6 marks]
Write a logo procedure triangle to make an equilateral triangle. The side length of the triangle should be passed to the procedure as a parameter. [3 marks]