Cursor

Below code doesn't work

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DECLARE
  empnum  tablename.empno%TYPE;
  name    tablename.ename%TYPE;
  TYPE cursor_var IS REF CURSOR;
  myCursorVar cursor_var;
BEGIN
  OPEN myCursorVar FOR SELECT empno,ename FROM tablename;
 
  for x IN myCursorVar LOOP
      DBMS_OUTPUT.PUT_LINE(x.empnum|| '  '|| x.name|| ' rowcount is ' || myCursorVar%ROWCOUNT);
 END LOOP;
 CLOSE myCursorVar;
=======================

but I change the
" for loop under BEGIN structure with below mention LOOP and END LOOP , it is working" --

LOOP
    FETCH myCursorVar INTO empnum,name;
    EXIT WHEN myCursorVar%NOTFOUND;
    DBMS_OUTPUT.PUT_LINE(name||'  '||empnum||' rowcount is '||
      myCursorVar%ROWCOUNT);
  END LOOP;


Question :: why it is not working with FOR loop ? or I am doing any mistakes