How do you return a string from a function in shell script?

Returning a string or word from a function

  1. You cannot return a word or anything else from a function.
  2. However, you can use echo or printf command to send back output easily to the script.

How do I return a value from a function in bash?

When a bash function completes, its return value is the status of the last statement executed in the function, 0 for success and non-zero decimal number in the 1 – 255 range for failure. The return status can be specified by using the return keyword, and it is assigned to the variable $? .

Can we return a value from shell script?

A function may return a value in one of four different ways: Change the state of a variable or variables. Use the exit command to end the shell script. Use the return command to end the function, and return the supplied value to the calling section of the shell script.

What is and2 in bash?

and >&2 means send the output to STDERR, So it will print the message as an error on the console. You can understand more about shell redirecting from those references: https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#Redirections.

How do I return a bash script?

Instead of using “exit 0”, you can simply use “exit” in your bash script to exit the code. So, open the same file and update your code.

What is $# in shell script?

$# is the number of positional parameters passed to the script, shell, or shell function. This is because, while a shell function is running, the positional parameters are temporarily replaced with the arguments to the function. This lets functions accept and use their own positional parameters.

How do you find the return value of a command?

The return value of a command is stored in the $? variable. The return value is called exit status. This value can be used to determine whether a command completed successfully or unsuccessfully.

What is >& 2 in shell script?