#!/bin/bash
# int-or-string.sh
# Á¤¼ö? ¹®ÀÚ¿­?

a=2334                   # Á¤¼ö.
let "a += 1"
echo "a = $a "           # ¿©ÀüÈ÷ Á¤¼öÁÒ.
echo

b=${a/23/BB}             # ¹®ÀÚ¿­·Î º¯È¯.
echo "b = $b"            # BB35
declare -i b             # Á¤¼ö·Î ¼±¾ðÇصµ µµ¿òÀÌ µÇÁú ¾ÊÁÒ.
echo "b = $b"            # ¿©ÀüÈ÷ BB35.

let "b += 1"             # BB35 + 1 =
echo "b = $b"            # 1
echo

c=BB34
echo "c = $c"            # BB34
d=${c/BB/23}             # Á¤¼ö·Î º¯È¯.
echo "d = $d"            # 2334
let "d += 1"             # 2334 + 1 =
echo "d = $d"            # 2335

# Bash ÀÇ º¯¼ö´Â º»ÁúÀûÀ¸·Î ŸÀÔÀÌ ¾ø½À´Ï´Ù(untyped).

exit 0