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...
Case statement is not a loop, it doesn’t execute a block of code for n number of times. Instead, bash shell checks the condition, and controls the flow of the program. In this article let us review the bash case command with 5 practical examples. The case construct in bash shell allo...
有时,如果条件变得混乱,所以你可以使用相同的条件case statements。 caseexpressioninpattern1 ) statements ;; pattern2 ) statements ;; ...esac Expression Examples: statement1 && statement2# 两边的条件都为truestatement1 || statement2# 其中一边为truestr1=str2# str1 匹配 str2str1!=str2# str1 不...
当您在shell中有多个不同的选择时,Bash case语句可用于简化复杂的条件。使用case语句而不是嵌套的if语句将让您使bash脚本更易读,更易于维护。 Bash case语句与Javascript或C switch语句具有类似的概念。主要区别在于,与C switch语句不同,Bash case语句一旦找到一个并执行与该模式关联的语句,就不会继续搜索模式匹配。
statement5 fi You can use this if .. elif.. if , if you want to select one of many blocks of code to execute. It checks expression 1, if it is true executes statement 1,2. If expression1 is false, it checks expression2, and if all the expression is false, then it enters into...
case In particular,we use these conditional statements to control the flow of execution based on different conditions. In this tutorial, we’ll focus on thecasestatement and learn how to write nestedcasestatements. Finally, we’ll learn how to use the;;terminator to end eachcaseoption. ...
Related:9 Examples of for Loops in Linux Bash Scripts Theifstatement says that if something is true, then do this. But if the something is false, do that instead. The "something" can be many things, such as the value of a variable,the presence of a file, or whether two strings match...
Bash case Statement Examples The sections below show practical examples of using the Bashcasestatement. Example 1: Output a Description for Each Option The following script lets the user choose a color and shows a comment based on the input using theecho command. ...
Learn the syntax and use of the Bash declare statement with examples. Master variable declaration and attributes in Bash scripting.
In order to check if a given file exists, users can perform conditional tests. In this case, we’ll useanifstatement with a-fflag. The flag checks if a given file exists and is a regular file. Start by creating the script file: ...