how to call one sp into another sp and use variables from it.

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE  PROCEDURE   [dbo].[validateQuery](
   @as_validationparam1 VARCHAR(20),
   @as_validationparam2 VARCHAR(20),
   @as_validationparam3 VARCHAR(20),
   @as_validatedResult varchar(100) out
)
as
BEGIN
  ----------do validation stuff
   
   set @as_validatedResult  ='result after validation'
END


SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE  PROCEDURE   [dbo].[callingQuery](
   @as_callingQueryparam1 VARCHAR(20),
   @as_callingQueryparam2 VARCHAR(20)
)
as
DECLARE @ds_result varchar(100)
BEGIN
  
   -----------call for validation
   EXEC	validateQuery 'validationparam1Value','validationparam2Value','validationparam3Value' , @ds_result OUT
END