A string constant is a sequence of $0$ to $255$ characters chosen from the standard ASCII $64$ character set.

Any legal character $($alpha or numeric$)$ may be used as a string and is designated as such when included in quotation marks $($i$.$e$.$ "ABC"$).$

A string constant can also consist of zero characters $($that is$,$ quotation marks around no characters$),$ which is referred to as the "nill" or "null" string. Some examples are:

"ABCDEF" $"123456""!!!$$$$"""$

When string constants are read in or written out, the quotation marks are omitted.

Question:

A $.$ B$.$ C$.$

What kind of a constant is this: $"4"$

Numeric

String

I can't tell $-$ it could be either string or numeric