echo exit status

The exit and exit status codes exit are used to end a script, just like in C. it also returns a value, which is passed to the parent process of the script. The parent process uses this value for further processing. each command returns an exit

Exit and exit Status Codes Exit is used to end a script, just like in C. it also returns a value, which is passed to the parent process of the script. The parent process uses this value for further processing. Each command returns an exit status

Just like what is the difference between the following code {code...} and {code? Humbly ask the experts for advice, just like The following code Echo 'configuration error'; exit (3); // Status 3 indicates exit due to configuration error And // Exit

Linux provides a special variable $ to save the exit status code of the last executed command. For commands that need to be checked, you must view or use the $? variable immediately after it has been run. Its value becomes the exit status code of

Original link: http://codingstandards.iteye.com/blog/836625 (reproduced please specify the source)Description of UseThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat:

Condition testTo determine whether a demand is satisfied, it needs to be implemented by a testing mechanism.different test conditions are expressed according to the execution status result of the command1, according to the execution status of the ID

I usually write about it. echo $data But I see people's code, a lot of them are exit($data) Reply content: I usually write about it.echo $dataBut I see people's code, a lot of them areexit($data) In general, you should use the Echo The

Linux Shell Bash with special meaning exit code purpose descriptionThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat: Exit nExit. Set the exit code to N. (cause the

Frequently-used commands echo, @, call, pause, and REM (TIPS: Use: instead of REM) are the most frequently-used commands for batch file processing. We started from them. First, @ is not a command, but a special identifier for DOS batch processing.

What are the differences between exit (0), exit (1), and exit (-1? When the process ends, the return value to the system is different. If your process is user, run echo $? You can see that the return value of your process is the value you set in the