新人求教~ 请问程序执行顺序是什么呢?请解释Region结果 谢谢!
程序代码如下:
Data work.geo;
infile datalines;
input City $20.;
if city='Tulsa' then State='OK';
Region='Central';
if City='Los Angeles' then State='CA';
Region='Western';
datalines;
Tulsa
Los Angeles
Bangor
;
Run;
执行结果:
City State Region
Tulsa OK Western
Los Angeles CA Western
Bangor Western