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📜 WAYPOINT LESSON

Checkpoint — Input pipeline

⭐ beginner⏳ 18 min read📍 Lesson 13 of 85

One method that reads like production validation code.

Checkpoint: the intake form

Task: implement static string ProcessField(string label, string input) which validates one form field:

  • label "age": must parse to an int 1–119 → "accept" else "reject:age".
  • label "score": must parse to an int 0–100 → "accept" else "reject:score".
  • any other label → "reject:label".
  • whitespace-only input (any label) → "reject:empty" (checked first).