本文我們在來一個case語句的練習，在命令終端，讓使用者輸入一些字元，然後判斷輸入的是字母還是數字，還是其他。

1.相關shell指令碼如下

#! /bin/bash
echo "Please input some charactor: \C"
read value

case $value in 
	[a-z])
	    echo "You had input $value a to z" ;;
	[A-Z])
	    echo "You had inut $value A to Z" ;;
	[0-9])
	    echo "You had input $value 0 to 9" ;;
	?)
	    echo "You had input $value is not a-z A-Z 0-9" ;;
	* ) 
	    echo "Default value" ;;
esac
 

執行結果