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CSP LabBy Educator Today
AP CSP course

Topic 3.12 · Interactive concept example

Call, return, display and resume

  • Argument binding and local calls
  • RETURN ends the call
  • DISPLAY is not a returned value

Change it · step through · explain

Change an input, predict what will happen, then advance one step. Read why the state changes, reset and experiment. This fixed teaching model does not save progress or award XP.

Ready · Make a prediction

Ready to explore: Call, return, display and resume
  1. Argument (0–10)3Waiting
  2. Procedure bodyreturnWaiting

Ready to explore: Call, return, display and resume

Why: Change an input, predict the first effect, then advance one step.

Try this: Change one input or choose another listed case. Predict the effect, reset and compare the states and governing rule.