how to change dataset names

[thanikondharish]

data male female;
set sashelp.class ;
if sex='M' then output male;
else if sex='F' output female ;
run;

proc datasets lib=work memtype=data;
change female=male ;
run;

I have rename the dataset names like already we have two datasets male and female.
now i have to rename male dataset as female and female dataset as male 
how to do in proc datasets procedure ?

[Patrick]

data male female;
  set sashelp.class;
  if sex='M' then output male;
  else if sex='F' then output female;
run;

proc datasets lib=work memtype=data nolist nowarn;
  delete _male _female;
  run;
  change female=_male male=_female;
  run;
  change _male=male _female=female;
  run;
quit;

[Kurt_Bremser]

This is the classic "exchange two objects" problem in computing. You always need a third temporary object to hold one of the values, you can't move the data (or names, in your case) concurrently.