For more information about general sequence and array predicates, see Sequences, Arrays, and Vectors, and Arrays.
stringp
object ¶This function returns t
if object is a string, nil
otherwise.
string-or-null-p
object ¶This function returns t
if object is a string or
nil
. It returns nil
otherwise.
char-or-string-p
object ¶This function returns t
if object is a string or a
character (i.e., an integer), nil
otherwise.