case expression in pattern-1) statement ;; pattern-2) statement ;; . . . pattern-N) statement ;; *) statement ;; esac 一个case语句必须与开始case的关键字和结束与esac关键字。表达式被评估并与每个子句中的模式进行比较， 直到找到匹配项。匹配子句中的一...
The case statement uses the Extension variable as the expression it tries to match to a clause. #!/bin/bash forFilein$(ls) do # extract the file extension Extension=${File##*.} case"$Extension"in sh) echo" Shell script:$File" ;; md) echo" Markdown file:$File" ;; png) echo"PN...
We have discussed already what a switch case, its syntax is. Now, we will see in detail how it will work in shell scripting. Initially, we initialize a variable with an expression or value and conditional statement checks whether it satisfies any condition, if yes then it will execute the ...
In a Bashcasestatement, the variable holds a value that is used to compare against defined patterns. When thecasestatement is executed, the script compares the input$variableagainst each pattern in the defined order until it finds a match. Once a match is found, the corresponding command associ...
In this tutorial, we will see how a switch case block can be used when creating conditional flow depending on the various values of a single expression. Unix Shell The case-esac Statement Unix Video #16: <img src="https://i.ytimg.com/vi/ID/hqdefault.jpg" alt="" width="480" height...
case expression in pattern-1) statement ;; pattern-2) statement ;; . . . pattern-N) statement ;; *) statement ;; esac 一个case语句必须与开始case的关键字和结束与esac关键字。 表达式被评估并与每个子句中的模式进行比较, 直到找到匹配项。
2. 'in that case' You say in that case or in which case to refer to a situation which has just been mentioned and to introduce a statement or suggestion that is a consequence of it. 'The bar is closed,' the waiter said. 'In that case,' McFee said, 'allow me to invite you back...
Mysql中的条件语句在我们对数据进行转换的时候比较有用,这样就不需要创建中转表。...[ELSE statement_list] END IF IF作为一条语句,在END IF后需要加上分号“;”以表示语句结束,其他语句如CASE、LOOP等也是相同的。...CASE 表达式 select CASE sva WHEN 1 THEN '男' ELSE '女' END as ssva from taname...
*) 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...
shell中的case语句与其他语言中的switch/case语句类似,是一种多分支选择结构 case $var in pattern1) Statement(s) to be executed when $var match pattern 1 ;; pattern2) Statement(s) to be executed when $var match pattern 3 ;; ...