what happens if I don't put exit in a shell script?
and what happens if I put exit 10000 in the end of a shell script?
I did it, and after running the script, It showed an error: too many argument, and added some 10000 in the end of the file of shell script code!?why?

I'm assuming you use a bash shell:

The the script returns the exit status of the last command executed in the script.

In general: An exit status of 0 (zero) tells you that all is OK. Any other status might indicate that something is wrong.

There are exceptions, the grep command being one. 0 means found, 1 means not found and 2 or larger means an actual error. Do check the manual page of the command to see which exit statuses can be generated.

10000 is an illegal number.
An exit status can be anything from 0 (zero) to 255. If you use a larger number bash will reduce it to the 0-255 range. In other words: exit 256 will return 0, exit 769 returns 1

Not sure if this related to the exit command. I do not get an error when using exit 10000

BTW: You can check the exit status by running: echo $?

All the ins and outs regarding exit can be found in the bash manual page (the EXIT STATUS section).

1 members found this post helpful.

You're right; thank you