how to list the temporary variable negative logical value

[tianerhu]

data work.all;
  merge apple.emp_name (in = emp_n)
        apple.emp_dept (in = emp_d);
  by empid;
  file print;
  put NOT emp_d=;
  run;

I code like above, but it doesn't work , the result is the logical value of the temporary emp_d ,not the 'not emp_d' , how should I do ?

[PaigeMiller · Accepted solution]

data work.all;
  merge apple.emp_name (in = emp_n)
        apple.emp_dept (in = emp_d);
  by empid;
  file print;
not_emp_d=(not emp_d);
  put NOT_emp_d=;
  run;

[tianerhu]

Thank you for your help.

[tianerhu]

the "not emp_d " is a expression ,not a variable , here we need a variable , so have the expression ---not emp_d assigned to a variable , then the code works . Thanks again.