Shulou(Shulou.com)06/03 Report--

Editor to share with you the scope of variables in the bash cycle example analysis, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

Let's take a look at a piece of wrong code first.

#! / bin/bash

For x in `ls * /. * /. * `

Cat $x | do echo $x

While read line

Do

C = `echo $line | awk-F' (''{print $1}'`)

# echo $c

ITunes $((iComplec))

Done

Echo

Done

Echo $I

What's wrong with the above code?

The pipe after cat will prevent the value of I from being incremented by 1.

The right way:

The code is as follows:

#! / bin/bash

For x in `ls * /. * /. * `

Do echo $x

While read line

Do

C = `echo $line | awk-F' (''{print $1}'`)

# echo $c

ITunes $((iComplec))

Done

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