Of course, if this was something that you would repeatedly do, you should run it from a script, use proper names for the variables, and all those good practices (including transforming the filename in an argument and defining where to send the output, but today, the topic iswhileloops). ...
The infinite loops are used for many purposes in Bash scripting, such as testing, debugging, event handling, and managing background processes. The while loop stands as one of the crucial loop structures, often employed to construct infinite loops. The syntax of the while infinite loop is given...
Example 1: Infinite While loop in a shell script An infinite While loop means your script will run the loop commands non-stop. Infinite While loops never stop running and this occurs when the condition always turns out to be “True.” ...
Here is a sample shell code to calculate factorial using while loop: #!/bin/bashcounter=$1factorial=1while[$counter-gt0]dofactorial=$(($factorial*$counter))counter=$(($counter-1))doneecho$factorial To run just type: $ chmod +x script.sh $ ./script.sh 5 Output: 120 While loops are...
$ ./script.sh 5 Output: 120 1. While loops are frequently used for reading data line by line from file: #!/bin/bash FILE=$1 # read $FILE using the file descriptors exec 3<&0 exec 0<$FILE while read line do # use $line variable to process line ...
问BASH:读入while循环EN基本语法（比较常见的两种形式）： 只要特定条件为真，”while” 语句就会执行 ...
controlling the flow of programs.These loops enable us to execute a block of code repeatedly, provided that a specified condition is true. Moreover,whileloops are versatile in that we can include user input as the specified condition, allowing a defined script to behave dynamically based on ...
bash can express a similar idea. Let’s say we wanted to display five numbers insequential order from one to five. a bash script could be constructed as follows: bash 能够表达相似的想法。比方说我们想要按照顺序从1到5显示五个数字。可如下构造一个 bash 脚本: ...
bash can express a similar idea. Let’s say we wanted to display five numbers insequential order from one to five. a bash script could be constructed as follows: bash 能够表达相似的想法。比方说我们想要按照顺序从1到5显示五个数字。可如下构造一个 bash 脚本: ...
bash can express a similar idea. Let’s say we wanted to display five numbers insequential order from one to five. a bash script could be constructed as follows: bash 能够表达相似的想法。比方说我们想要按照顺序从1到5显示五个数字。可如下构造一个 bash 脚本: ...