---

#!/bin/bash

while true; do
  echo "enter your name:"
  read name
  if [[ -z $name ]]; then
    echo "bye"
    break
  fi

  echo "enter your age:"
  read age
  if [[ $age -eq 0 ]]; then
    echo "bye"
    break
  fi

  if [[ $age -le 16 ]]; then
    group="child"
  elif [[ $age -le 25 ]]; then
    group="youth"
  else
    group="adult"
  fi

  echo "$name, your group is $group"
done