Flowcharts

• Flowcharts: A diagram that shows the steps in a process or algorithm
• Diamond: used when the next step is dependant on a condition either being met or not. Should be a question resulting in a Yes/No answer. Lines drawn from the diamond should be labelled Yes/No to show which path to take

  A) Decision

  
• Rhombus: used for input and output. for example, a user entering data, or a message being displayed on screen

  A) Data

  
• Predefined process: used to show a separate flow chart which is drawn elsewhere and then inserted into the flow chart. Used to simplify the diagram

  A) Predefined Process

  
• Terminator: A labelled stop or start to indicate where the flowchart begins and ends

  
• Document: if a document is generated as an output, this symbol is used. box with wavy bottom line

  A) Document

  
• Square: a single step in an algorithm. do not combine multiple steps, use one box per instruction/single step

  A) Process

  
• Rectangle with a line at each end of the shape: used to show a separate flow chart which is drawn elsewhere and then inserted into the flow chart. Used to simplify the diagram

  A) Predefined Process