The loop structure is one of the key components of every programming language including Bash. They are used to repeat the specified instructions against a condition. Frequently employed loop structures in Bash scripting arefor,while, anddo-while. In Bash scripting, thewhileloop functions by repeatin...
while 循环用于不断执行一系列命令,也用于从输入文件中读取数据;命令通常为测试条件。其格式为: while condition do command done 无限循环 无限循环语法格式: while : do command done 或者 while true do command done 或者 for (( ; ; )) until 循环 until 循环执行一系列命令直至条件为真时停止。 until 循...
如果我在while-loop中使用服务器名,它可以工作,但是我需要为每个服务器使用一个while-loop,而不是一个。所以这就是我现在所拥有的,但我不能让它运行。我对剧本有点陌生,所以我很感谢所有的帮助 #!/bin/bash servers=("qaServerName1 qaServerName2 qaServerName3 ... ...") for VARIABLE in $servers do...
/bin/bash while true do echo "endless loop" done 可以在 if/then 中作占位符: #!/bin/bash condition=5 if 【 $condition -gt 0 】 #gt表示greater than,也就是大于,同样有-lt(小于),-eq(等于) then : # 什么都不做,退出分支 else echo "$condition" fi 变量扩展/子串替换 在与 > 重定...
How to do a do-while loop in bash? How to create an infinite loop in bash? How to find if a number is odd or even in bash? How to iterate over a bash array? How to loop over each line of a file? How to iterate over a list of files? How to use numbers with leading zeros...
Each of these loop methods has its advantages and disadvantages. ‘For’ loops are simple and straightforward, making them a good choice for basic array looping. ‘While’ and ‘until’ loops offer more control over the loop condition, which can be useful in more complex scenarios. However, ...
6.循环loop 6.1 while do done, until do done (不定循环) 6.2 for...in...do...done (固定循环) 6.5 for...do...done 的数值处理 7.shell script的追踪与debug 四、补充 1.打印进度条 2.文件描述符(参考第一章18小节) 3.进程检测
在Bash脚本,有3种类型loops:for loop,while loop, 和until loop. 这三个用于迭代值列表并执行一组给定的命令。 Bash For 循环语法 for loop遍历一系列值并执行一组命令。 For loop采用以下语法: forvariable_name in value1 value2 value3..ndocommand1 ...
A while loop is used to calculate the factorial of the input number. The loop iterates from 1 to the input number. Within the loop, the 'factorial' variable is updated by multiplying it with the 'ctr' variable. Finally, the factorial of the input number is printed to the terminal. ...
# bash while loop while [ $choice -eq 4 ]; do # read user input read choice # bash nested if/else if [ $choice -eq 1 ] ; then echo "You have chosen word: Bash" else if [ $choice -eq 2 ] ; then echo "You have chosen word: Scripting" ...