how to define alphanumerics on sas
Its a good idea to provide as much information as possible when asking a question, this helps us give good answers. From what I can gather from that, you would create character varaibles:
data want; length char_var $100; char_var="ABC1234"; run;
Definitely, your question needs a lot more explanation about what you want to do ... however ... as a guess:
Use the ANYALNUM function.
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