The ISALNUM function checks that an expression consists entirely of alphanumeric characters.
NOTE: This function is only available in jBASE 4.1 and later.
expression can return a result of any type. The ISALNUM function will then return TRUE (1) if the expression consists of entirely alphanumeric characters. The function will return FALSE (0) if any character in the expression is not alphanumeric.
When the ISALNUM function is used in International Mode the properties of each character are determined according to the Unicode Standard.