What is the result of the function execution in the Bash script?

In Bash, a function returns an exit code (an integer from 0 to 255), which can be used to check for successful execution. To pass data from a function, output via echo or modification of global variables are usually used.

Example:

my_function() {
  echo "Result of the function"
  return 0  # successful exit code
}

result=$(my_function)
echo "Function returned: $result"

Here, return sets the exit code, and echo outputs the result, which can be saved in a variable.