求助：在macro中，如何跳出循环

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例如：有个循环，要求满足条件是就跳出循环执行循环后面的语句。

%do while(...);
%if condition then
跳出循环或者执行下次循环;
%end;
....
...


类似于C语言中的break和continue语句的功能，谁知道？

[此贴子已经被作者于2008-9-16 13:47:09编辑过]

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关键词：Macro acr CRO Mac condition Macro

Leave和continue

Leave表示从循环中退出，而continue表示跳过此轮循环，继续下一轮循环。例如

data leave_it;
   Interest = .0375;
   Total = 100;
    do Year = 1 to 100;
         Total = Total + Interest*Total;
         output;
         if Total ge 200 then leave;
     end;
    format Total dollar10.2;
run;

当总数大于或等于200时，则退出循环。

data continue_on;
  Interest = .0375;
  Total = 100;
  do Year = 1 to 100 until (Total ge 200);
      Total = Total + Interest*Total;
      if Total le 150 then continue;
      output;
   end;
format Total dollar10.2;
run;

只要Total小于或等于150，执行语句会跳到loop底部，而忽略output。

这个是在data步中的

我问的是在macro中的语句

%goto quit;

See this -

-----------------------------------

CONDITIONALLY PROCESS THE DATA SET OR END EXECUTION OF THE MACRO

The %INCLUDE statement retrieves SAS source code from an external file. The SOURCE2 option causes the

inserted SAS statements to appear in the SAS log. The PROCESSDATA.SAS program contains a DATA step and

two PROC steps to read and process the specified data set and create two reports. %QUIT is a macro label; in this

macro, the %QUIT is right before the %MEND. When the %GOTO statement branches macro processing to the

%QUIT label, the macro execution stops.

%include "c:\workshop\ws126\processdata.sas" / source2;

%quit:

%mend expense1;

-------------------------------------

Source: http://www2.sas.com/proceedings/sugi29/126-29.pdf

[此贴子已经被作者于2008-9-17 14:44:53编辑过]