*程序如下：;

data benefitTable;
do i=1 to 5;

input name $ idno status $;

if status='PT' then continue;

input benefits $10.;

output;
end;
datalines;
Jones 9011 PT   *i=1;
Thomas 876 PT  * i=2;
Richards 1002 FT
Eye/Dental
Kelly 85111 PT  *i=3;
Smith 433 FT
HMO
Richards 1002 FT
Eye/Dental
Kelly 85111 PT  *i=4;
Smith 433 FT
HMO
Jones 9011 PT  *i=5;
Thomas 876 PT
Richards 1002 FT
Eye/Dental
Kelly 85111 PT
Smith 433 FT
HMO
Richards 1002 FT
Eye/Dental
Kelly 85111 PT
Smith 433 FT
HMO
;
run;

*
不明白，此例中do循环有什么作用？do i=1 to 5,应该在*i=5;处循环就结束了啊，怎么结果能输出8条观测呢？
;