#!/bin/bash

func2 () {
   if [ -z "$1" ]                    # ù¹ø° ¸Å°³º¯¼ö ±æÀÌ°¡ 0 ÀÎÁö È®ÀÎ.
   then
     echo "-ù¹ø° ¸Å°³º¯¼ö ±æÀÌ°¡ 0 ÀÔ´Ï´Ù.-"  # ¸Å°³º¯¼ö°¡ ¾øÀ» °æ¿ì¿¡µµ.
   else
     echo "-ù¹ø° ¸Å°³º¯¼ö´Â \"$1\" ÀÔ´Ï´Ù.-"
   fi

   if [ "$2" ]
   then
     echo "-µÎ¹ø° ¸Å°³º¯¼ö´Â \"$2\" ÀÔ´Ï´Ù.-"
   fi

   return 0
}

echo
   
echo "¸Å°³º¯¼ö ¾øÀÌ ºÒ·¯º¸ÁÒ."   
func2                          # ¸Å°³º¯¼ö ¾øÀÌ È£Ãâ
echo


echo "±æÀÌ°¡ 0 ÀÎ ¸Å°³º¯¼ö¸¦ ³Ñ±è."
func2 ""                       # ±æÀÌ°¡ 0 ÀÎ ¸Å°³º¯¼ö·Î È£Ãâ
echo

echo "³Î ¸Å°³º¯¼ö¸¦ ³Ñ±è."
func2 "$uninitialized_param"   # ³Î ¸Å°³º¯¼ö·Î È£Ãâ
echo

echo "¸Å°³º¯¼ö ÇÑ °³¸¦ ³Ñ±è."   
func2 first           # ¸Å°³º¯¼ö ÇÑ °³·Î È£Ãâ
echo

echo "¸Å°³º¯¼ö µÎ °³¸¦ ³Ñ±è."   
func2 first second    # ¸Å°³º¯¼ö µÎ °³·Î È£Ãâ
echo

echo "\"\" \"second\" ¸¦ ³Ñ±è."
func2 "" second       # ù¹ø° ¸Å°³º¯¼ö ±æÀÌ´Â 0
echo                  # µÎ¹ø° ¸Å°³º¯¼ö´Â ¾Æ½ºÅ° ¹®ÀÚ¿­

exit 0