proc format;
value answer 1='yes'
             2='no';
run;

proc format cntlout=fmtout;
  select answer;
run;

data _null_;
   set fmtout;
   where fmtname="ANSWER" and type="N" and strip(start)="1";
   call symputx("mvar",label);
run;

%put &mvar;

不是我想要的过程，谢谢回复！

如果是字符格式 value $chr "A"="B"; 也一样吗？

proc format;
value $answer "1"='yes'
             "2"='no';
run;

proc format cntlout=fmtout;
  select $answer;
run;

data _null_;
   set fmtout;
   where fmtname="ANSWER" and type="C" and strip(start)="2";
   call symputx("mvar",label);
run;

%put &mvar;