The macro is a text generator. Your macro generates dsn1,...,dsn5.

When you use it, the generated codes should follow SAS syntax. Here is the correct way to use it. See below,


1    %macro names(name= ,number= );
2       %do n=1 %to &number;
3          &name&n
4       %end;
5    %mend names;
6
7    data %names(name=dsn,number=5) ;
8      x=1;
9    run;

NOTE: The data set WORK.DSN1 has 1 observations and 1 variables.
NOTE: The data set WORK.DSN2 has 1 observations and 1 variables.
NOTE: The data set WORK.DSN3 has 1 observations and 1 variables.
NOTE: The data set WORK.DSN4 has 1 observations and 1 variables.
NOTE: The data set WORK.DSN5 has 1 observations and 1 variables.
NOTE: DATA statement used (Total process time):
      real time           0.04 seconds
      cpu time            0.01 seconds

哦，谢谢。

那第一个问题呢？
&name&n ，&name.&n ，&&name.&n这3个有区别吗

我总觉得，&name&n会被解析成&name1吗。。

这3个木有区别

如果是&&name&n就不同拉

Q: &name&n ，&name.&n ，&&name.&n这3个有区别吗?
A: In this context they are the same. ---> dsn5;

Q: 我总觉得，&name&n会被解析成&name1吗。。
A: &name&n  = resoved &name || resoved &n = dsn5
  SAS resolves process for a macro variable         &&name&n   1)  &&-->&      and &n --->5
                                                                                         2) &name5  ---> the value of macro variable of name5. If the variable is not defined, SAS macro facility will issue a warning message.