Algorithms

• Computing
• Upper Secondary (Key Stage 4)
• GCSE

Algorithms

Algorithms

Key learning intension: What is an algorithm and how do we write them?

What is this symbol called?

1. Terminator (start/end)
2. Process
3. Input/output
4. Decision

What is this symbol called?

1. Terminator (start/end)
2. Process
3. Input/output
4. Decision

What is this symbol called?

1. Terminator (start/end)
2. Process
3. Input/output
4. Decision

What is this symbol called?

1. Terminator (start/end)
2. Process
3. Input/output
4. Decision

An algorithm is a list of steps to follow in order to solve a problem.

Let's create an algorithm to sign in to our student accounts.

1. Take a user input for username

2. Take a user input for password

3. Check if username = username and password = password then log in

4. Else ask them to try again tries +1

5. If tries > 3 then lock account

Flowchart example

Create an algorithm for brushing your teeth. Think about toothbrush, toothpaste, length, order tasks are done in. 

Create the flowchart for the algorithm using the correct shapes. 

Can you code it?

Create a algorithm of your choice and the flowchart.

What is an algorithm?

Name one of the blocks in this flowchart?

What does this do?