we get the value the value.

if we want something from that method/procedure to return 
then use out parameter
1st we call that method with out parameter. then give some 
value to that out parameter in procedure and then use that 
value...
so to get the required value we use out parameter

A out parameter is a parameter option to pass value to the 
calling function. If a function needs to return multiple 
values to the calling function the it is best to use out 
parameter whereas return parameter can be used for 
returning only one value.

An out parameter should be marked with an out keyword, and 
the parameter should be initialized inside the function.

out parameter option to pass value to the 
calling function. for array it can used in a flexible way...
 out can be used as calling function in methods

methods cannot have out parameters only parameters with ref 
or value can be passed to method/function

When we talk about procedures in Sql server we can have out 
parameters. They are mainly used when you want to return 
multiple values and non numeric values from the sql 
procedures

They are usefull when you are calling a procedure from 
another procedure and need some specfic values

Out Parameter: Used to pass a parameter as a reference so
that the function called will set the value. This could be
used to return more than 1 value by a function.
e.g.

public int AddMuliply( int a int b out int c)
{
c a*b;
return ( a+b);
}