What's the use of allowing to copy empty string to clipboard? [duplicate]

1. How do you copy an empty string?
2. What does copy to clipboard mean?
3. Can you copy multiple things to clipboard?

How do you copy an empty string?

The strcpy() function copies string2, including the ending null character, to the location that is specified by string1. The strcpy() function operates on null-ended strings. The string arguments to the function should contain a null character (\0) that marks the end of the string.

What does copy to clipboard mean?

If your device lets you copy and paste things, then it has a "clipboard," a place where anything you copy gets kept. But most devices don't let you see the clipboard — it just works invisibly in the background. Android devices don't follow that rule.

Can you copy multiple things to clipboard?

Select the first item that you want to copy, and press CTRL+C. Continue copying items from the same or other files until you have collected all of the items that you want. The Office Clipboard can hold up to 24 items.