Introduction
What is an algorithm?
An algorithm is a set of step-by-step instructions used to solve a problem. They are used by both human beings and computers.
Algorithms for Humans
Common examples of algorithms for humans include:
Fire evacuation Procedures
Cooking Recipes
Furniture assembly instructions
Washing Machine Usage Instrucitons
Algorithms for Computers
Computers require algorithms to function and these usually come in the form of software. Computers differ from humans in that the instructions provided must completely unambiguous – they must be clear and not open to interpretation.
Algorithms for computers include:
- Software program instructions
- Device handling instructions
- Data storage instructions
Activity 1
Activity 1 – Alien shopping algorithm
An alien has landed on earth and you have decided to send him on an important mission – to do your weekly shopping down at the supermarket! You have been given a shopping list. The alien has never been shopping before – can you write a set of instructions for it to do the shopping for you?
Remember!
Your algorithm must be:
- Step-by-step.
- Unambiguous – Each step must be completely clear and specific.