A string constant in MIIS is a sequence of $0$ to $255$ characters chosen from the standard ASCII $64$ character set. Any legal character $($alpha or numeric$)$ may beused as a string and is designated as such when included in guotation marks $($e$..,$ "ABC"$).$A string constant can also consist of zero characters, that is$,$ quotation marks around no characters. This is referred to as the null stringSome examples of legal strings:"ABCDEF""$123456""!!!$$$"When string constants are readin or written out, the quotation marks are omittedWhat kind of a constant is this: $"4"$