We all know there are two styles of comments in SAS: * ; and /* */. Normally when we want to disable a chunk of code, we will choose /* */.
But I bet you have such experience that you cannot do it well with /* */ since parts of the code itself might contain /* */ style comments. Therefore, in this case, only the code up to the first */ would be commented. So the best method to disable a chunk of code is to put it in a macro declaration and never call the macro, for example:
%macro comment; --- --- --- %mend comment;