Shell scripting, specifically Bash scripting, is a great way to automate repetitive or tedious tasks on your systems. Why type when you can schedule and run scripts in a hands-free manner? One of the many scripting constructs is the loop. A loop is a section of code that picks up data ...
Use While Loop in Bash While running bash scripts, you'll come across times when you want to run tasks repeatedly such as printing the value of a variable in a specific pattern multiple times. In this tutorial, I'm going to walk you through the following: The syntax of the while loop...
Example #1: Integer Comparison inwhileLoop inbash In awhileloop, integer comparison inside the square brackets should be expressed usingbash's built-in comparison operators (-eq for "equal to", -ne for "not equal to", -gt for "greater than", -ge for "greater than or equal to", -lt ...
While loop in bash The while loop tests a condition and then keeps on looping as long as the condition is true. while [ condition ]; do commands done If you take the previous example, it can be rewritten using the while loop like this: ...
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
/bin/bash for num in {1..10}; do echo $num done 如果你运行它,你应该会看到像这样的输出: $ ./for-loop.sh 1 2 3 4 5 6 7 8 9 10 你也可以使用for num in 1 2 3 4 5 6 7 8 9 10; do,但是使用括号扩展使得代码看起来更短且更智能。
Example 01: Simple While Loop The very first example will only explain the single while loop in bash. The empty nano editor is opened via the terminal shell. It’s time to add some bash code to it. We have started our bash code with the bash extension i.e. “#!/bin/sh”. We hav...
/bin/bash for num in {1..10}; do echo $num done 如果你运行它,你应该会看到像这样的输出: $ ./for-loop.sh 1 2 3 4 5 6 7 8 9 10 你也可以使用for num in 1 2 3 4 5 6 7 8 9 10; do,但是使用括号扩展使得代码看起来更短且更智能。
Bash 中的 while 循环详解 循环是编程语言的基本概念之一。当您想要多次运行一系列命令直到满足特定条件时,循环很方便。 在诸如Bash之类的脚本语言中,循环对于自动执行重复性任务非常有用。在Bash脚本中有3个基本的循环结构,for循环,while循环,until循环。
In this tutorial, you will explore the three different bash loop structures. You will also learn how to use loops to traverse array elements. Furthermore, you will learn how to use break and continue statements to control loops, and finally, you will learn how to create infinite loops. ...