2. How do I write an if statement in a shell script? Writing an if statement in a shell script involves specifying a condition and the actions to take if the condition is true. Here’s the basic syntax: if[condition];then# code to execute if condition is trueelse# code to execute if...
If-statement-Bash-Script-Example if-else Statement 除了普通的 if 语句之外,我们还可以用 else 块扩展 if 语句。基本思想是,如果语句为真,则执行 if 块。如果语句为假,则执行 else 块。 Syntax : if [ condition_command ] then command1 command2 …….. last_command else command1 command2 …….. ...
shell script 1.shell script基础 1.1.脚本文件格式: 第一行,顶格:#!/bin/bash 代码注释:# 缩进,适度添加空白行; 脚本的状态返回值: (1)默认是脚本中执行的最后一条命令的状态返回值; (2)自定义退出状态码:exit[n](n为自己指定的状态码); 注意:shell进程遇到exit时,即会终止,因此,整个脚本执行即为...
1.1 if格式 if condition; then commands; fi 1.2 else if 和 else if condition; then...
Here are some useful examples of if-else in shell scripts to give you a better idea of how to use this tool. Command Description && Logical AND $0 Argument 0 i.e. the command that’s used to run the script $1 First argument (change number to access further arguments) -eq Equality ch...
如何在Mac OS的Shellscript中编写if-else语句? 我的目标很简单。我正在尝试编写一个包含if-else语句的MacOs Shell脚本。具体来说,如果我的桌面上有一个名为“newFolder”的文件,我希望脚本创建一个名为“targets”的新文件。其次,如果桌面上存在名为“ifolder”的文件夹,我希望脚本创建一个名为“days”的新文件...
So far all the if else statement you saw were used in a proper bash script. That's the decent way of doing it but you are not obliged to it. When you just want to see the result in the shell itself, you may use the if else statements in a single line in bash. ...
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Use if else statement Now I add an else statement in the previous script. This way when you get a non-zero modulus (as odd numbers are not divided by 2), it will enter the else block. #!/bin/bash read -p "Enter the number: " num ...
[ s1 ] (true if s1 is not empty, else false) [ -n s1 ] (true if s1 has a length greater then 0, else false) [ -z s2 ] (true if s2 has a length of 0, otherwise false) Example Script number.sh #!/bin/bash echo -n “Enter a number 1 < x < 10: " ...