linux shell判断用户输入的数据类型

judge_data_type.sh 

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#!/bin/bash

read -p "Please input one character:" key
case $key in
  [a-z]|[A-Z])
     echo "alphabet"
     ;;
  [0-9])
     echo "number"
     ;;
     *)
     echo "space、tab or other control character"
     ;;
esac

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验证：

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[root@logstash ~]# sh judge_data_type.sh 
Please input one character:a
alphabet
[root@logstash ~]# sh judge_data_type.sh 
Please input one character:3
number
[root@logstash ~]# sh judge_data_type.sh 
Please input one character:	
space、tab or other control character
[root@logstash ~]#

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原创作者: ztj1216 转载于: https://blog.51cto.com/ztj1216/11339141