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Tips Talk:Using IFC to Conditionally Execute Global Statements
There are several similar function-terms, like IFN, etc. How they are named would be interesting to some (myself included.) I did a Google-search and ended up in the sasCommunity page describing one of them, but didn't learn any root-etymology. Obvious, now, is that IFC abbreviates, "IF-Conditionally". Charlie Shipp 03:11, 21 January 2010 (UTC)
Good Tip. In the data step, functions are type based so IFC is for character arguments and IFN is for numeric arguments. Since macro is a text manipulation language IFC is used here. --Don Henderson 14:05, 24 January 2010 (UTC)
Thanks. That sentence of explanation would be good for others also (in the tip, don't you think?) Charlie Shipp 03:02, 5 February 2010 (UTC)
Waiting for a third person to say, "OK"; and possibly Art to see if the added sentence is to his liking. HTH. Charlie Shipp 03:03, 12 February 2010 (UTC)
I undid the second sentance. Actually both IFN and IFC can be used with the macro language. It is not a matter of the arguments. IFC returns a character value, while IFN returns a numeric. When building code it is generally more useful to have a character result.
%let name=Fred; %put %sysfunc(ifn(&name=Charlie,1,2,3));
--Art Carpenter 05:19, 12 February 2010 (UTC)
I added a bit of the above text to the tip. --Art Carpenter 23:08, 17 January 2011 (UTC)