Python Algorithms for A/S Computer Science

This is a collection of Python implementations of algorithms discussed in the Cambridge A and A/S Level Computer Science text book.

They are also suitable for other exam boards and study at GCSE for more able students.

Programs included:

• Using nested loops to print a rectangular pattern
• Printing a pyramid pattern - not using functions
• Printing a pyramid pattern - using functions
• Printing a hollow pyramid pattern - not using functions
• Printing a pyramid pattern - using functions

These algorithms are fun and satisfying for students due the the pleasing visual output. It is a good idea to give students the chance to implement them for themselves before providing solutions.

The Python code given in the teacher’s resource for this course is un-pythonic and often contains errors. The implementations provided here are written in a more pythonic style, are free from errors and provide an intuitive mapping to the pseudo-code given for the algorithms.

Please note that I have translated the CIE pseudo-code construct of REPEAT…UNTIL using

while True:
# commands
if condition:
break

which I consider the best conceptual equivalent.

I hope you find this resource helpful.