#!/bin/bash
# subshell.sh

echo

outer_variable=Outer

(
inner_variable=Inner
echo "¼­ºê½©ÀÇ \"inner_variable\" = $inner_variable"
echo "¼­ºê½©ÀÇ \"outer\" = $outer_variable"
)

echo

if [ -z "$inner_variable" ]
then
  echo "inner_variable Àº ½©ÀÇ ¸ÞÀο¡¼­ Á¤ÀǵÇÁö ¾Ê¾Ò½À´Ï´Ù."
else
  echo "inner_variable Àº ½©ÀÇ ¸ÞÀο¡¼­ Á¤ÀǵǾú½À´Ï´Ù."
fi

echo "½© ¸ÞÀÎÀÇ \"inner_variable\" = $inner_variable"
# $inner_variable Àº ÃʱâÈ­µÇÁö ¾ÊÀº °Íó·³ º¸À̴µ¥,
# ¼­ºê½©¿¡¼­ Á¤ÀÇµÈ º¯¼ö´Â ±× ¼­ºê½©ÀÇ "Áö¿ª º¯¼ö"À̱⠶§¹®ÀÔ´Ï´Ù.

echo

exit 0