What are best practices for using positional parameters ($1, $2, $@)?

Using positional parameters in shell scripting is essential for creating flexible and maintainable scripts. Here are some best practices:

• Use Quotes: Always quote your positional parameters to prevent word splitting and globbing issues. For example, use "$1" instead of $1.
• Check for Arguments: Before accessing positional parameters, check if the required arguments are provided to avoid errors.
• Use Shift Command: Use the shift command to process multiple positional parameters in a loop, making your script more readable.
• Use $@ and $*: When passing parameters to other scripts or functions, consider using "$@" for all parameters to maintain quoting.