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Alphanumeric is a combination of alphabetic and numeric characters , which may include letters, numbers, and special characters like hyphens and underscores. It is widely used in generating various identification codes, passwords, and usernames for increased security and uniqueness. Learn what alphanumeric characters are and how they are used in passwords, programming, file names and data representation. Find out why they are valuable and see some examples of alphanumeric character combinations. Alphanumeric characters combine letters and numbers , consisting of uppercase and lowercase letters from the English alphabet and the digits 0 to 9. They play a critical role in computing, data representation, and security. Alphanumeric characters or alphanumerics refers to characters belonging to the English alphabet and Arabic numerals . It includes both lower and uppercase characters.
