case "charlie"
of "alfa":
  echo "A"
of "bravo":
  echo "B"
of "charlie":
  echo "C"
else:
  echo "Unrecognized letter"
 
case 'h':
of 'a', 'e', 'i', 'o', 'u':
  echo "Vowel"
of '\127'..'\255':
  echo "Unknown"
else:
  echo "Consonant"
 
proc positiveOrNegative(num: int): string =
  result = case num:
    of low(int)..-1:
      "negative"
    of 0:
      "zero"
    of 1..high(int):
      "positive"
    else:
      "impossible"
 
echo positiveOrNegative(-1)

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