how to store result of a function to vatiable in ORACLE

CREATE OR REPLACE FUNCTION GETACNAME (Vscheme IN VARCHAR2 , Vacno IN NUMBER)
RETURN VARCHAR2 IS   
 	VAcName  		VARCHAR2(200);   
	AcNoType		VARCHAR2(2);   
BEGIN   
	
	SELECT S_ACNOTYPE INTO AcNoType FROM SCHEMAST WHERE S_APPL = Vscheme ;   
	
	If AcNoType = 'TD' Or AcNoType = 'SB' Or AcNoType = 'CA' Or AcNoType = 'AG' Or AcNoType = 'GS' Or AcNoType = 'IV' Or AcNoType = 'LK' Then
	 	SELECT  AC_NAME Into VAcName FROM DPMaster    
		WHERE	Ac_AcNoType = AcNoType
			And AC_TYPE = Vscheme
			And AC_NO = Vacno     ;   
		
	End If;   

 RETURN VAcName ;

 END GETACNAME ;