Class tools · Timing

Class stopwatch

Start/stop stopwatch with lap marks.

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Prompt shell

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Provide a stopwatch with start/stop/reset and lap capture; show milliseconds optionally.
How to use

No placeholders - just copy and use.

Provide (Inputs)
  • Show milliseconds? (yes/no)
Expected output (Outputs)
  • Elapsed time
  • Lap list
Tips
  • Include keyboard shortcuts.
  • Keep display large.
  • Store last lap times briefly.
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