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• Flowcharts


  One simple way to visualize an algorithm
• Flowchart elements


  • Arrows represent flow
  • Rectangles represent things to do
  • Rounded rectangles represent where the flowchart begins and ends
  • Diamonds represent decisions
• Flowchart elements


  • Arrows represent flow
  • Rectangles represent things to do
  • Rounded rectangles represent where the flowchart begins and ends
  • Diamonds represent decisions
• Flowcharts are used to visualize algorithms
• Flowcharts have a beginning and an end
• Flowcharts show the flow of an algorithm
• Flowcharts have decision points
• Heuristics


  Rules of thumb or strategies that help solve problems
• Snap!


  A visual programming language that uses a metaphor of blocks that, when snapped together, cause something to happen
• Snap!


  • The blocks are arranged in pallets
  • We will reproduce the script at right, just to give you an idea of Snap!'s power
  • Next week we'll study Snap! in detail
• Snap! is a visual programming language
• Flowcharts show how data flows through a program