Execute Stored Procedure with Return Value and assign returned value to Variable in SQL Server

Here Mudassar Ahmed Khan has explained with an example, how to execute a Stored Procedure that Returns value and assign its returned value to a variable in SQL Server. Using the EXEC function returning value of a Stored Procedure to a variable is supported in all SQL Server versions i.e. 2000, 2005, 2008, 2008R2, 2012, 2014 or higher.