Nim submission.
import strutils proc significantFigures(n: float): int = formatFloat(n) .replace(".") .strip(chars={'0'}) .len() when isMainModule: assert significantFigures(1) == 1 assert significantFigures(003) == 1 assert significantFigures(3000) == 1 assert significantFigures(404) == 3 assert significantFigures(050030210) == 7 assert significantFigures(0.1) == 1 assert significantFigures(0.0) == 0
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Nim submission.