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One way of representing algorithms is to use flow charts, also called flow diagrams. They are a useful way of planning how a computer program might work, and show others your thinking.

A flow chart shows the key points in an algorithm:

  • the start and end
  • the order in which the sequences of instructions are performed
  • the points where inputs and outputs occur
  • the points where decisions are made about what to do next

A sequence of many instructions that does not involve any of these key points may be represented as a single rectangular box.



Additonal reading



Shape Name  
Flowchart Line.svg Flow Line  
Flowchart Terminal.svg Terminal  
Flowchart Process.svg Process  
Flowchart Decision.svg Decision  
Flowchart IO.svg Input/Output  


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