You can have two conditions in your IF statements.
if sex=0 and wbc >= 370 and wbc <= 500 then wbc_category=0;
else wbc_category=1;
Note that I've formatted your code in your original question. In the future please take the time to do so yourself, and it helps if you only include code relevant to the problem at hand. If you're using SAS EG, highlight your code and press CTRL+I to have it formatted. In SAS studio, use the second from last icon in the ribbon. Formatting your code for legibility makes it easier to find errors and to debug.
Additionally, please note that everyone on here is a volunteer and respectful and polite responses are appreciated. Statements like the one below are not helpful.
you did not answer my question?
how to implement eg 2 !!!
RBC?
that however is sas fault there are few online guides !!
There are a ton of SAS 'online guides' out there if you search.
For starters, the first programming course (online version) is free and would cover the topic in your question.
Additionally, here are some other resources you can use in the future to help you learn.
https://support.sas.com/edu/schedules.html?ctry=us&crs=PROG1
http://video.sas.com/#category/videos/how-to-tutorials
Lexjansen.com -> use this if you have a specific topic you'd like help with. This are user written papers so the quality can vary.
https://stats.idre.ucla.edu/sas/modules/
The first Statistics e-course is also free.
