In shell scripts, the default scope of variables is local to the script or the function in which they are defined. This means that if you declare a variable without using the export command, it will only be accessible within that script or function and will not be available in the parent shell or other scripts.
If you want a variable to be accessible in the parent shell or other scripts, you need to use the export command to make it an environment variable. Here's an example:
# Local variable
my_var="Hello"
echo $my_var # This will print "Hello"
# Exporting a variable
export my_env_var="World"In this example, my_var is local to the script, while my_env_var is exported and can be accessed in the parent shell.
