Shell 循环语句 for循环 原创 云丽周阿 10月前 353阅读 linuxshelldowhile循环 在Linux系统中,Shell脚本是一种非常重要的编程语言,可以用于自动化执行各种任务。而在Shell脚本中,循环是一种非常基本且常用的结构。其中,dowhile循环是一种特殊的循环结构,它先执行循环体中的代码,然后再判断循环条件是否成立。接下来我...
综上所述,我们可以通过使用do-while循环节点进行12次循环来方便的计算每月的数据,同时使用3个SQL节点分别计算近1月(30天)、近2月(60天)、近3月(90天)的数据。通过使用${dag.loopTimes}来代表当前循环到第几个月,从而在SQL节点中计算出当月第1天的分区及前1月第1天、前2月第1天、前3月第1天的分区。最...
–Awk Do whileloop is called exit controlled loop, whereas awk while loop is called as entry controlled loop. Because while loop checks the condition first, then it decides to execute the body or not. But theawk do whileloop executes the body once, then repeats the body as long as the ...
bash/ shell脚本while语句 、 我是shell编程的新手...基本上我是一个新手,但我需要一个简单的脚本来做while循环和执行一个php脚本。我尝试过以下几种方法:i=0do(( i++ ))但是由于某些原因,语法不是很好...我收到错误行4:在意外标记‘`do’附近出现...
However, the script block runs only while the condition is false. The continue and break flow control keywords can be used in a Do-While loop or in a Do-Until loop. Syntax The following shows the syntax of the Do-While statement: PowerShell Copy do {<statement list>} while (<...
1 解析shellshell是一个解释器,为了解释Unix命令,目的就是交互,因为shell就是为了实现Unix命令的思想来引入的;shell命令就是Unix系统命令;shell同时又是一种编程语言,如提供了变量定义、控制结构等。所以shell包含了unix系统命令、系统命令解释器和编程语言三个部分。 shell是一种泛称。Bash shell是shell的一种具体实现,...
Do-While loop until input is null Does anyone know how to AutoFit Columns starting from a particular Row in Excel? Does closing the command window kill a process? Does Compare-Object return anything if there is an exact match? Does get-aduser with -select always truncate the fields? Does ...
# find... while loop. This uses find -print0 and shell's read -d which are # POSIX additions in 2023 and released in 2024 # (and have long been widely implemented). # Fails on Cygwin; in while loops, filenames ending in \r \n and \n look =. ...
for i in "${!cmds[@]}"; do echo "$((i+1)) => ${cmds[i]}" done } # Main interactive loop while true; do # Print available commands tips # Prompt for user input read -p "Enter the command number to execute (or 'q' to quit): " choice ...
but to meDo…While…Loopseemed easier and more flexible. I looked and cannot find an example of how to useDo…While…Loopin Windows PowerShell. I can find theForEachstatement, but not theDo…While…Loop. It will be a bear if I have to switch over and completely change the ...