return command in Linux with examples

return command is used to exit from a shell function. It takes a parameter [N], if N is mentioned then it returns [N] and if N is not mentioned then it returns the status of the last command executed within the function or script. N can only be a numeric value.

The return command is especially useful when writing complex shell scripts, as it provides a mechanism for error handling and decision-making based on the status codes returned by various functions or commands.

Syntax

return [N]

where,

• [N]: Optional numeric value representing the exit status. If [N] is not provided, the return value will be that of the last command executed in the function.

Basic return Command Example

Note: echo $? is used to display the last return status.

Option used with the return command

return --help : It displays help information.

Key Differences Between return and exit

return: Used to exit from a function and return a status code. It is only applicable inside functions.

exit: Terminates the entire script and can be used anywhere within the script.

Conclusion

The return command helps in shell scripting that allows you to control the flow of your scripts by exiting functions and specifying return codes. By using return, you can make your scripts more robust and able to handle different conditions and errors efficiently.