This function returns the first character in @var{string}. If the
string is empty, the function returns 0. (Under XEmacs 19, the value is
also 0 when the first character of @var{string} is the null character,
This function returns the first character in @var{string}. If the
string is empty, the function returns 0. (Under XEmacs 19, the value is
also 0 when the first character of @var{string} is the null character,