How to Return a String from Bash Functions

Bash function can return a string value by using a global variable. In the following example, a global variable, 'retval' is used. A string value is assigned and printed in this global variable before and after calling the function. The value of the global variable will be changed after calling the function.

1. How do you return a string from a function in Shell?
2. How do you return a string value?
3. How do I return a bash script?
4. What function is used to return a string?
5. Does echo return a string?
6. What is a string in bash?
7. Can we return a string in Python?
8. Can I return a string in Python?
9. Can you return a string in JS?
10. What is exit in bash?
11. What is exit code in Linux?
12. Where are bash functions stored?

How do you return a string from a function in Shell?

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 you return a string value?

Strings in C are arrays of char elements, so we can't really return a string - we must return a pointer to the first element of the string. All forms are perfectly valid. Note the use of const , because from the function I'm returning a string literal, a string defined in double quotes, which is a constant.

How do I return a bash script?

The return status can be specified by using the return keyword, and it is assigned to the variable $? . The return statement terminates the function. You can think of it as the function's exit status . #!/bin/bash my_function () echo "some result" return 55 my_function echo $?

What function is used to return a string?

The "string" key word that precedes the "function" key word tells you that the MyFunction function returns a string value to the calling script or user-defined function.

Does echo return a string?

You can echo a string, but catch it by piping ( | ) the function to something else. You can do it with expr , though ShellCheck reports this usage as deprecated.

What is a string in bash?

String Manipulation in Bash

Functions, arrays, and strings are stored in variables. ... Despite there being a system to modify the behavior of variable assignment, when it all comes down to it, values are stored in variables as strings. In bash, a program lives to put strings into variables and name them for later use.

Can we return a string in Python?

Python return string

Let's look at an example where our function will return the string representation of the argument. We can use the str() function to get the string representation of an object.

Can I return a string in Python?

You can use any Python object as a return value. Since everything in Python is an object, you can return strings, lists, tuples, dictionaries, functions, classes, instances, user-defined objects, and even modules or packages.

Can you return a string in JS?

To return a string from a JavaScript function, use the return statement in JavaScript.

What is exit in bash?

Bash provides a command to exit a script if errors occur, the exit command. The argument N (exit status) can be passed to the exit command to indicate if a script is executed successfully (N = 0) or unsuccessfully (N != 0). If N is omitted the exit command takes the exit status of the last command executed.

What is exit code in Linux?

What is an exit code in the UNIX or Linux shell? An exit code, or sometimes known as a return code, is the code returned to a parent process by an executable. On POSIX systems the standard exit code is 0 for success and any number from 1 to 255 for anything else.

Where are bash functions stored?

Typically bash functions are permanently stored in a bash start-up script.

1. System-wide start-up scripts: /etc/profile for login shells, and /etc/bashrc for interactive shells.
2. User define start-up scripts: ~/. ...
3. More information on interactive/login shells can be found in the bash man page in the INVOCATION section.