The syntax of the while loop Multiple examples of the while loop So let's start with the first one. How to use the while loop in bash Like any other loop, while loop does have a condition statement and the condition is the crucial factor to iterate the loop. See, whenever you start ...
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. This article shows how you can use a while loop in a bash script by using different examples. Syntax of while loop: while [ condition ] ...
While Loop This is a very simple example, where theloopexecutes untilNUMBERis not greater than10and prints theecho statement. Along withwhilewe will use thereadcommand to read the contents of a file line by line. Below is the syntax of howwhileandreadcommands are combined. Now there are di...
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...
The while Loop SyntaxA while loop in bash consists of a conditional expression and a loop body which is surrounded by do and done. The loop body continues to be executed as long as the condition evaluates to true. The conditional expression in while loop can be surrounded by either a pair...
In scripting languages such as Bash, loops are useful for automating repetitive tasks. There are three basic loop constructs in Bash scripting, for loop , while loop, and until loop .This tutorial covers the basics of while loops in Bash. We’ll also show you how to use the break and co...
A While loop in a Bash script will trigger a series of commands to run repeatedly for as long as the condition result is “True.” Below is an example of Bash While loop syntax. Example: Explicit example: One-line While loop example: ...
Bash Until Loop The until statement is very similar in syntax and function to the while statement. The only real difference between the two is that the until statement executes its code block while its conditional expression is false, and the while statement executes its code block while its co...
I'll explain it in a bit. Let's see its syntax first. until [ condition ]; do commands done Now, if I have to use the same example of printing numbers from 1 to 10 using until loop, it would look like this: #!/bin/bash ...
bashwhile-loopscopesh 279 在下面的程序中,如果我在第一个`if`语句内将变量$foo设置为值1,那么它的值会被记住并保留在`if`语句之后。然而,当我在一个`while`语句内的`if`内将同一变量设置为值2时,它会在`while`循环后被遗忘。它的行为就像我在`while`循环内使用了某种变量$foo的副本,并且我只修改了该...