Guess my number [from rosetta code]

guess.nim

import random, rdstdin, strutils
 
randomize()
 
let iRange = 1..100
 
echo "Guess my target number that is between ", iRange.a, " and ", iRange.b, " (inclusive)."
let target = random(iRange)
var answer, i = 0
while answer != target:
  inc i
  let txt = readLineFromStdin("Your guess " & $i & ": ")
  try:
    answer = parseInt(txt)
  except ValueError:
    echo "  I don't understand your input of '", txt, "'"
    continue
    
  if answer < iRange.a or answer > iRange.b:
    echo "  Out of range!"
  elif answer < target:
    echo "  Too low."
  elif answer > target:
    echo "  Too high."
  else:
    echo "  Ye-Haw!!"
 
echo "Thanks for playing."