Ben10, Johnny5, THX1138...
Health
bhaskaran7010
The username you entered contains characters that are not letters or numbers. If you entered a space or a dash (-) you'll probably get this error.
Any character which is not A-Z or 0-9. Examples of non-alphanumeric characters: !"£$%^&*()
Any character which is not A-Z or 0-9. Examples of non-alphanumeric characters: !"£$%^&*()
kabeer123,ami345,alpha12,3etc....
kabeer123,ami345,alpha12,3etc....
Anything that is a number or a letter is an alphanumeric character, so examples are punctuation and symbols: [, }, ~, /, *, @, and so on.
Username is the public name that you are known by. Password is a secret alphanumeric that only you know and use to gain access to a software programme, user account, web site etc.
The user name should only contain letters in the alphabet and numbers. examples of acceptable character would include: 0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ All other characters are not accepted.
The term alphanumeric refers to any term that is composed of letters and/or numbers, and would therefore include such things as: leep87gr231, elb7ty987ghy, and so forth. Alphanumeric terms are often used as passwords.
Non-alphanumeric characters on the keyboard are those that are neither alphabetic nor numeric. Examples are commas, underscores, colons and semicolons.