Getting program input parameters 

Retrieving program input parameters or arguments is very similar to function parameters at the most basic level. They can be accessed in the same fashion as $1 (arg1), $2 (arg2), $3 (arg3), and so on. However, so far, we have seen a concept called flags, which allows you to perform neat things such as-l, --long-version, -v 10, --verbosity=10. Flags are effectively a user-friendly way to pass parameters or arguments to a program at runtime. For example:

bash myProgram.sh -v 99 --name=Ron -l Brash

Now that you know what flags are and how they can be helpful to improve your script, use the following section as a template.