In some usages, the alphanumeric character set may include both upper and lower case letters, punctuation marks, and symbols (such as @, &, and *, for example). For languages other than English, alphanumeric characters include letter variations such as é and ç.
What is an an alphabetic character?
1. alphabetic character – the conventional characters of the alphabet used to represent speech; “his grandmother taught him his letters” letter of the alphabet, letter. spelling – forming words with letters according to the principles underlying accepted usage.
What is a non alphabetic character?
Approach: Non-alphabetic characters are basically any character that is not a number or letter. It can be English alphabetic letters, blank spaces, exclamation points (!), commas (, ), question marks (?), periods (.), underscores (_), apostrophes (‘), and at symbols (@).