3.1.4

Algorithms (2/2)

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Algorithms

 

Repetition

Repetition

  • Repetition means doing the same step over again.
  • The step can be repeated with different variables.
    • A variable is something that can change.
Repetition: example

Repetition: example

  • The toppings must be placed on the cakes.
  • The step is repeated for each cake (repetition).
  • But the type of topping can change each time (variable).
Repeat until...

Repeat until...

  • Sometimes a step can be repeated until something happens.
  • Then we can move to the next step.
  • A step is repeated until something happens.
  • This step is called a ‘repeat until’ instruction.
Repeat until: example

Repeat until: example

  • Put cake batter in each paper case.
  • Repeat until all the cases are filled
  • Then stop and go to the next step.
Jump to other topics
1

Using Computers

1.1

Computers as a Tool

1.1.1Uses of Computers1.1.2More Uses of Computers1.1.3Advantages of Information Technology1.1.4More Advantages of Information Technology
1.2

Data

1.2.1Storing Data1.2.2Databases1.2.3Sorting & Filtering Data1.2.4Interrogating Data
1.3

Plagiarism & Illegal Sharing

1.3.1Plagiarism1.3.2Copyrighted Content
2

Networks & the World Wide Web

2.1

Networks

2.1.1Parts of Networks2.1.2The Internet2.1.3The World Wide Web
2.2

Searching Online

2.2.1Searching the World Wide Web2.2.2Searching Tips2.2.3Reliable Information
2.3

Protecting Yourself Online

2.3.1Your Digital Footprint2.3.2Being Safe2.3.3Online Safety2.3.4Viruses2.3.5Malware2.3.6People Online2.3.7Your Feelings2.3.8Getting Help
3

Computational Thinking

3.1

Computational Thinking

3.1.1Computational Thinking3.1.2Decomposing Tasks3.1.3Algorithms (1/2)3.1.4Algorithms (2/2)3.1.5Logical Reasoning & Debugging
4

Computer Languages

4.1

Coding

4.1.1Code4.1.2Programs4.1.3Writing Programs4.1.4Writing Your Own Program: Input, Outputs, Design4.1.5Turning an Algorithm into an App (1/2)4.1.6Turning an Algorithm into an App (2/2)

Practice questions on Algorithms (2/2)

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  1. 1
    What is a variable?Multiple choice
  2. 2
    What does a 'repeat until' instruction do?Multiple choice
  3. 3
    What do you call it when you change the cupcake topping each time?Multiple choice
  4. 4
    What does repetition mean in computing?Multiple choice
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Algorithms (1/2)

Logical Reasoning & Debugging