What is an Algorithm?

• A picture that you use to make a program

• A precise set of instructions

• Shapes and symbols connected together

• Breaking a problem down into smaller tasks

This is a graphical representation of an algorithm

• Computer Program

• Binary Diagram

• Decomposition

• Flowchart

What is Decomposition?

• Breaking the problem down to look for specific patterns

• Solving the problem by placing the algorithm into a single flowchart

• Breaking the task down into smaller, more manageable tasks

• Identifying where the algorithm needs to be repeated so that it save you time when writing it

Which Scratch block would be used for Iteration?

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Which Scratch block would be used for Selection?

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Which Scratch block would be used for a variable?

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Which Scratch block would be used for a sub-routine?

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What is a Variable?

• It is a place where you can store some data

• It is a place in your code that changes

• It is a name given to a special sub-routine that changes how the program works

• It is when you want to add two number together

If Josh is 11 years old, what will this program print out?

• It won't print out anything

• You are old enough for Year 8

• You are still in year 7

• It will print out his age

If Jenny is 13, which message will be broadcast?

• Message 1

• Message 2

• Message 3

• Message 4