结束当前宏：%return；

中止SAS：%abort cancel；

跳转：%goto xxx；
定义为： %xxx：

goto在宏中怎么用啊   没找到相关的例子

here is a sample about the goto statement.

%macro check(parm);
   %local status;
   %if &parm= %then %do;
       %put ERROR:  You must supply a parameter to macro CHECK.;
       %goto exit;
   %end;

  /* more macro statements that test for error conditions */

   %if &status > 0 %then %do;
       %put ERROR:  File is empty.;
       %goto exit;
   %end;

   /*more macro statements that generate text */

   %put Check completed successfully.;
%exit: %mend check;

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