#!/bin/bash echo echo "\"0\" Å×½ºÆ®" if [ 0 ] # zero then echo "0 Àº Âü." else echo "0 Àº °ÅÁþ." fi echo echo "\"NULL\" Å×½ºÆ®" if [ ] # NULL (empty condition) then echo "NULL Àº Âü." else echo "NULL Àº °ÅÁþ." fi echo echo "\"xyz\" Å×½ºÆ®" if [ xyz ] # ¹®ÀÚ¿ then echo "ÀÓÀÇÀÇ ¹®ÀÚ¿Àº Âü." else echo "ÀÓÀÇÀÇ ¹®ÀÚ¿Àº °ÅÁþ." fi echo echo "\"\$xyz\" Å×½ºÆ®" if [ $xyz ] # $xyz °¡ ³ÎÀÎÁö Å×½ºÆ®... # ÇÏÁö¸¸ ´ÜÁö ÃʱâȵÇÁö ¾ÊÀº º¯¼öÀÏ ¶§¸¸. then echo "ÃʱâÈ ¾È µÈ º¯¼ö´Â Âü." else echo "ÃʱâÈ ¾È µÈ º¯¼ö´Â °ÅÁþ." fi echo echo "\"-n \$xyz\" Å×½ºÆ®" if [ -n "$xyz" ] # Á» ´õ ¾î·Æ°Ô º¸ÀÌ°Ô. then echo "ÃʱâÈ ¾È µÈ º¯¼ö´Â Âü." else echo "ÃʱâÈ ¾È µÈ º¯¼ö´Â °ÅÁþ." fi echo xyz= # ³Î °ªÀ¸·Î ÃʱâÈ. echo "\"-n \$xyz\" Å×½ºÆ®" if [ -n "$xyz" ] then echo "³Î º¯¼ö´Â Âü." else echo "³Î º¯¼ö´Â °ÅÁþ." fi echo # "false"°¡ ÂüÀÏ ¶§. echo "\"false\" Å×½ºÆ®" if [ "false" ] # "false"´Â ±×³É ¹®ÀÚ¿ °°ÁÒ? then echo "\"false\" ´Â Âü." #+ ±×·¡¼ ÂüÀÌ µÇ³×¿ä. else echo "\"false\" ´Â °ÅÁþ." fi echo echo "\"\$false\" Å×½ºÆ®" # ÃʱâÈ ¾È µÈ º¯¼ö, ´Ù½Ã. if [ "$false" ] then echo "\"\$false\" ´Â Âü." else echo "\"\$false\" ´Â °ÅÁþ." fi # Èì, ÀÌ°Ô ¿ì¸®°¡ ¿øÇÏ´ø °ÅÁÒ. echo exit 0