<c:choose> <c:when test="${requestScope.newFlag== '1' || requestScope.newFlag== '2' ...
通过使用不同的数据运行脚本来验证脚本: Example of running bash script with logical operators in if statement ️ 练习时间 让我们做一些练习吧 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是...
The main advantage of using ‘else if’ in bash scripting is that it allows your scripts to handle multiple conditions, making them more flexible and powerful. However, it’s important to be aware of potential pitfalls. For instance, the order of your conditions matters. The script will execu...
Example of running bash script with logical operators in if statement 🏋️ 练习时间 让我们做一些练习吧 😃 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是否存在。你可以提供完整的文件路...
1、bash中的变量变量命名规则: 1.只能包含字母、数字和下划线,并且不能以数字开头 2.不应与系统中已有的变量重名 3.最好做到见名知意 1.1、变量:是指在内存中抽出一块空间,然后把这块空间命名...command(s) fi if/elif/else 命令:格式: if command then co...
/bin/bash echo "Enter password" read pass if [ $pass="password" ] then echo "The password is correct." else echo "The password is incorrect, try again." fi The output of the above script is: Conclusion The if-else in shell script is a valuable tool for shell programmers. It is ...
When trying to understand the working of a function like if-else in a shell script, it is good to start things simple. Here, we initialize two variables a and b, then use the if-else function to check if the two variables are equal. The bash script should look as follows for this ...
I like to have a simple script which says MEH! when there is no input arg, otherwise prints it. #!/bin/bash if [${#$1}==0] then echo "MEH!"; else echo $1; fi OS says the line 4 has a error (unexpected token else at line 4). So sorry dude. Thanks in advance. linux ...
/bin/bash # test if then bad if abcde then echo "go to bed" fi [root@zw-test-db ~]# sh test2 test2: line 3: abcde: command not found 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 报错了,echo没执行 then 可以使用多个命令,shell会将这些命令当成一个块,if语句行的那个命令返回退出...
/bin/bash # #*** #Author: Kevin Ma #QQ: 1065015188 #Date: 2021-04-05 #FileName: yesorno_if.sh #URL: www.kevin306.cn #Description: The test script #Copyright (C): 2021 All rights reserved #*** read -p"Are you OK (yes/no)? "answer if...