This tutorial guide was about using the “while true” loop in the Bash script. We have discussed using a while true loop with very simple Bash codes and addressed the while loop with no “true” condition. This has been done to clearly compare both circumstances and how to handle them se...
示例:Bash 中的无限 while 循环 #!/bin/bash while true do echo "This is an infinite while loop. Press CTRL + C to exit out of the loop." sleep 0.5 done 输出: This is an infinite while loop. Press CTRL + C to exit out of the loop. This is an infinite while loop. Press CTRL...
bash while : do echo "This is another infinite loop." sleep 1 done 在这两个例子中,true和:命令总是返回状态码0(表示成功),因此循环会无限进行下去。 说明如何安全地中断bash中的无限循环: 要安全地中断Bash中的无限循环,可以使用Ctrl+C组合键。这将发送一个中断信号给正在运行的脚本或命令,强制其停止执...
Bash while Loop The while loop is used to performs a given set of commands an unknown number of times as long as the given condition evaluates to true. The Bash while loop takes the following form: while [CONDITION] do [COMMANDS] done Copy ...
In Bash scripting, the while loop functions by repeating a set of instructions as long as the specified condition is true.
condition为true时命令1到命令3将会一直执行,知道条件为false ,例如: 1. #!/bin/bash x=1 while [ $x -le 5 ] do echo "Welcome $x times" x=$(( $x + 1 )) done 1. 2. 3. 4. 5. 6. 7. Here is a sample shell code to calculate factorial using while loop: ...
问带有if语句的Bash while循环停滞在true循环中ENPython 编程中 while 语句用于循环执行程序，即在某条件...
使用太多的"while True:"循环可能会导致程序陷入无限循环的状态,造成系统资源的浪费和性能下降。这种循环通常用于实现长时间运行的任务或者监听事件,但如果没有适当的退出条件或者控制机制,就会一直...
bash shell 中常用的 loop 有如下三种: * for * while * until for loop 是从一个清单列表中读进变量值,并"依次"的循环执行 do 到 done 之间的命令行。 例: for var in one two three four five do echo --- echo '$var is '$var echo done 上...
Three types of loops are used in bash programming. While loop is one of them. Like other loops, a while loop is used to do repetitive tasks. The starting and ending block of the while loop is defined by do and done keywords in the bash script. The termin