The following article describes the basic syntax and includes a simple example of the BASHCASEstatement usage. TheCASEstatement is the simplest form of theIF-THEN-ELSEstatement in BASH. You may use theCASEstatement if you need theIF-THEN-ELSEstatement with manyELIFelements. With the BASHCASEstat...
Shell case esac 语句case ... esac 与其他语言中的 switch ... case 语句类似,是一种多分枝选择结构。case 语句匹配一个值或一个模式,如果匹配成功,执行相匹配的命令。case 语句格式如下:case 值in 模式1) command1 command2 command3 ;; 模式2) command1 command2 command3 ;; *) command1 command2 ...
ExamplesIn this section, we'll see couple of examples of the 'if/elif/else' statement.Exampe #1:#!/bin/bash # b.sh if [ "$#" -gt 0 ] then echo "There are $# args!" fi if [ "$1" = "arg1" ] then echo "argument 1 is $1" fi Output:...
case语句:选择结构 case switch(变量值) in value1) statement … ;; value2 statement … ;; *) statement … ;; esac 例:输入随便输入一个字符判断字符类型。 1 #!/bin/bash 2 # 3 case $1 in 4 [0-9]) 5 echo “A Digit.” ;; 6 [a-z]) 7 echo “Lower.” ;; 8 [A-Z]) 9 ec...
Bash shell case statement is similar to switch statement in C. It can be used to test simple values like integers and characters. Case statement is not a loop, it doesn’t execute a block of code for n number of times. Instead, bash shell checks the cond
statement ;; esac 编写脚本,判断用户输入的字符串 #!/bin/bash # read -p "Enter string: " str case $str in linux|Linux) echo "windows." ;; windows|Windows) echo "linux." ;; *) echo "other." ;; esac 特殊变量: 位置变量 $1, $2 ,$3 ,$4 ... $9, ${10}, $1:...
*) echo -e "[ERROR] = Wrong Input, Exiting the script.." esac User confirmation using case statement Example 5 - Case statement with return codes You can write logic to capture the return code of the previously run command and take some actions using case statements. I am creating a GUI...
Now, let’s make the above script file executable using thechmodcommand and run it: $ chmod +x case_script.sh $ ./case_script.sh The color is green. The output shows thatgreenmatches the second pattern in thecasestatement, and the corresponding message is printed. ...
JavaScript Tutorials - Herong's Tutorial Examples∟Flow Control Statements∟"switch ... case" Statement Example This section provides a JavaScript tutorial example showing how to write a 'switch ... case' statement.© 2025 Dr. Herong Yang. All rights reserved.To help you understand how "switch...
Conditional statements help in deciding the proper execution path for operations. Unix/Linux Shell supports two conditional statements: The if...else statement The case...esac statement Control statements are used to indicate how the control is transferred during the program execution....