How to get stored procedure parameters details?

Question

Where can I find information about stored procedure parameters? In my situation I need to know only the input parameters of given store procedure.

In the sys.o

Answer 1

An extension of Raj's answer above

;WITH CTE
 AS (SELECT OBJECT_NAME(OBJECT_ID) AS  sql_module_name
           ,CASE
                WHEN OBJECTPROPERTY(OBJECT_ID,'IsProcedure') = 1 THEN 'Stored Procedure'
                WHEN OBJECTPROPERTY(OBJECT_ID,'IsScalarFunction') = 1 THEN 'Scalar Function'
                WHEN OBJECTPROPERTY(OBJECT_ID,'IsTableFunction') = 1 THEN 'Table Function'
            END AS                     sql_module_type
           ,parameter_id AS            parameter_order
           ,name AS                    parameter_name
           ,is_nullable AS             parameter_is_nullable_flag
           ,is_output AS               parameter_is_output_flag
           ,TYPE_NAME(user_type_id) AS parameter_type
           ,max_length AS              parameter_length
           ,CASE
                WHEN TYPE_NAME(system_type_id) = 'uniqueidentifier' THEN precision
                ELSE OdbcPrec
                     (system_type_id,max_length,precision
                     )
            END AS                     parameter_precision
           ,OdbcScale
            (system_type_id,scale
            ) AS                       parameter_scale
     FROM   sys.parameters)
 SELECT DENSE_RANK() OVER(
        ORDER BY sql_module_type
                ,sql_module_name ASC) AS group_id
       ,sql_module_name
       ,sql_module_type
       ,parameter_order
       ,parameter_name
       ,parameter_is_nullable_flag
       ,parameter_is_output_flag
       ,parameter_type
       ,parameter_length
       ,parameter_precision
       ,parameter_scale
 FROM   CTE
 ORDER BY sql_module_type
         ,sql_module_name
         ,parameter_order;