PYTHON PROGRAMMING

Week 6 - Tuesday

WHAT’S AN ALGORITHM?

https://www.youtube.com/watch?v=6hfOvs8pY1k

LAST WEEK

Functions Defining functions Parameters Why bother?

Algorithms Designing algorithms Stepwise refinement

REMINDERS

Pen portraits – Bradley, Malik

Update targets based on assignment and check existing targets John to go through targets individually

Elvis – set up email on Edmodo

Bradley – assignment 1

MT2 – Cris, Bethany

TODAY

Algorithms Solve problems using top down development and stepwise refinement

Python Writing functions with and without parameters Calling functions with arguments Some library/built in functions

ALGORITHM – LARGEST OF THREE NUMBERS From homework:

Find and display the largest of three numbers entered through the keyboard. Solve this using the four major steps method. (Taken from textbook p. 22)

Class activity – get an algorithm on the IWB we are ALL happy with!

Now write the program….

ALGORITHM DESIGN

Top down design – hierarchy chart for quadratic equation solver Activity – Topic 1.2

Stepwise refinement Activity – sum and average

PRACTICAL

Codecademy: Functions

Plus Exercises Challenges

RECAP

What is top down design?

What is stepwise refinement?

What are the four major steps used in computer based problem solving?

What is the difference between and argument and a parameter.

TOMORROW

More on algorithms

Functions – practice

Assignment 2

HOMEWORK

Read through Topic 1.2 and make some notes