- SYNOPSIS
-
Tests if a one-character string is alphanumeric.
- DESCRIPTION
-
The call isalnum s tests whether the first character of string s (normally
it is the only character) is alphanumeric, i.e. an uppercase or lowercase
letter, a digit, an underscore or a prime character.
- FAILURE CONDITIONS
-
Fails if the string is empty.
- SEE ALSO
-
isalpha, isbra, isnum, issep, isspace, issymb.