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...
In Bash scripting, thewhileloop functions by repeating a set of instructions as long as the specified condition is true. Typically, the while loop is preferred where the number of iterations is uncertain or variable. In this guide, I will explore theBash while loop, its syntax, and usage th...
Bash while Loop 只要给定条件的计算结果为true,while循环就会使用一组给定的命令执行多次。 Bash while循环采用以下形式: while [CONDITION] do [COMMANDS] done 在执行命令之前评估条件。如果条件计算结果为true,则执行命令。否则,如果条件的计算结果为false,则循环将终止,程序控制将传递给后面的命令。
while true; do 开始一个循环并一直重复。 echo -n "Enter the word: "; -n禁止在句末使用通常的换行符。 IFS=$'\n\t ' 显式设置内部字段分隔符。这意味着bash对单词的解释是,输入在换行符(\n)、制表符(\t)和空格('')上“分开”;一般来说,这是默认值,但是在per-script的基础上手动设置IFS或...
#!/bin/bash while true; do read -p "Do you want to continue? (yes/no): " response if [[ "$response" == "no" ]]; then echo "Exiting the loop." break else echo "Continuing..." fi done 在这个例子中,read 命令用于读取用户的输入,-p 选项会在提示后直接显示输入的提示符。然后,脚...
Bash For 循环 – 第一种方法 当在进入 bash 循环之前知道迭代次数时,通常使用 for 循环。Bash 支持两种 for 循环。bash for 循环的第一种形式是: forvarnameinlistdocommands ##Bodyofthe loop done 在上面的语法中: for、in、do 和 done 是关键字 ...
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...
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