linux,shell中if else if的寫法,if elif

需求描述mysql

  在寫shell腳本的過程當中,用到了if else的寫法,忽然有多個參數須要判斷redis

  那麼就想到了if else if的用法,因而進行以下的測試。sql

測試過程shell

1.寫以下的測試腳本,進行多個值的判斷tomcat

#!/bin/bash

if [[ $1 = 'tomcat' ]]; 
then
  echo "Input is tomcat"
else if [[ $1 = 'redis' ]] || [[ $1 = 'zookeeper' ]];
then
  echo "Input is $1"
else
  echo "Input Is Error."
fi

2.執行腳本,看腳本是否正常執行bash

[oracle@standby ~]$ ./ts01.sh zookeeper
./ts01.sh: line 12: syntax error: unexpected end of file

備註:發現執行是錯誤的,通過查看能夠知道,shell腳本中不是else if而是elif這個寫法oracle

3.修改腳本測試

#!/bin/bash

if [[ $1 = 'tomcat' ]];
then
  echo "Input is tomcat"
elif [[ $1 = 'redis' ]] || [[ $1 = 'zookeeper' ]];
then
  echo "Input is $1"
else
  echo "Input Is Error."
fi

4.再次執行修改過的腳本spa

[oracle@standby ~]$ ./ts01.sh zookeeper
Input is zookeeper
[oracle@standby ~]$ ./ts01.sh tomcat
Input is tomcat
[oracle@standby ~]$ ./ts01.sh redis
Input is redis
[oracle@standby ~]$ ./ts01.sh mysql
Input Is Error.

備註:腳本執行正常,正確的輸出了須要的結果。code

shell腳本中else if的正確使用方法

if condition;
then
    commands;
elif condition;then
    commands;
else
     commands;
fi

 

文檔建立時間:2018年3月14日10:54:11

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