Yes/Noで答えるプロンプト ref: http://qiita.com/hisamekms/items/b8b07a64facff399c721

file0.txt

#!/bin/zsh
while true; do
  read Answer\?'Do you like coffee? [Y/n]'
  case $Answer in
    '' | [Yy]* )
      echo Yes!
      break;
      ;;
    [Nn]* )
      echo No!
      break;
      ;;
    * )
      echo Please answer YES or NO.
      ;;
  esac
done

file1.txt

#!/bin/bash
while true; do
  read -p 'Do you like coffee? [Y/n]' Answer
  case $Answer in
    '' | [Yy]* )
      echo Yes!
      break;
      ;;
    [Nn]* )
      echo No!
      break;
      ;;
    * )
      echo Please answer YES or NO.
  esac
done;