RANDOM 是一个内部 bash 函数,它在每次调用时返回一个随机整数。 Bash While 循环 Shell 编程语言提供的另一个迭代语句是 while 语句。 Syntax:whileexpressiondocommands done 在上面的while循环语法中: while、do、done 是关键字 表达式是返回标量值的任何表达式 While 语句导致在提供的条件表达式为真时执行代码块。
RANDOM 是一个内部 bash 函数,它在每次调用时返回一个随机整数。 Bash While 循环 Shell 编程语言提供的另一个迭代语句是 while 语句。 Syntax: while expression do commands done 在上面的while循环语法中: while、do、done 是关键字 表达式是返回标量值的任何表达式 While 语句导致在提供的条件表达式为真时执行代...
问bash中的shell脚本在while循环中使用regexEN您好，我正在尝试验证用户输入不是空的，并且是一个数字或...
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 Multiple examples of the ...
Bash while Loop in One Line It is always a good practice to use fewer lines of code. The while loop in Bash also offers a one-liner structure. The syntax of Bash while loop as a one-liner is given below: while [condition]; do commands_to_execute; done ...
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 ] ...
The following syntax is used for bash shell to read a file using while loop: whileread-rline; do echo"$line"; done
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 ...
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...
Bash While loop example 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: