Live ORACLE

DECLARE

 PROCEDURE Swap

      (n1  NUMBER,

       n2  NUMBER)

 IS

   num1  NUMBER;

   num2  NUMBER;

   FUNCTION Balance

        (bal  NUMBER)

   RETURN NUMBER

   IS

     x  NUMBER := 10;

     PROCEDURE Swap

          (d1  DATE,

           d2  DATE)

     IS

     BEGIN

       NULL;

     END;

     PROCEDURE Swap

          (b1  BOOLEAN,

           b2  BOOLEAN)

     IS

     BEGIN

       NULL;

     END;

   BEGIN

     dbms_output.Put_line('The following raises an error');

   

     -- swap(num1, num2); wrong number or types of arguments in call to 'SWAP'

     RETURN x;

   END balance;

 BEGIN

   NULL;

 END swap;

BEGIN

 NULL;

END;

/

Resolving PL/SQL Procedure Names