Dynamic SQL usage in procedure

Selecting data from a table, here the table name is dynamic...

The below code doesn't work due to the dynamic table name

CREATE PROC DynamicData ( @tableName VARCHAR(100))
AS
SELECT * FROM @tableName 

To overcome above limitation, we suppose to use dynamic SQL

CREATE PROCEDURE DynamicData(@tblname nvarchar(127))
AS
EXEC('SELECT *
      FROM ' + @tblname + ';')

--Calling SP
EXEC DynamicData 'EMPLOYEE'
EXEC DynamicData 'DEPT'