Description 
The Include procedure includes a set value in a set variable.
A set variable is one that can contain 0, some, or all values of a set. When you Include a set value in a set variable, you are adding to the included values in the variable.
Include is equivalent to the + operator, as shown here :
Include(CardHand, JackOfClubs);
CardHand := CardHand + [JackOfClubs];
For example, you can insert a playing card into a players hand  where the hand is based on a set of all playing cards in a deck.
Use Exclude to remove a value from a set variable. This would, for example, allow a card to be removed from a player's hand.


Related commands 
Exclude 

Exclude a value in a set variable 
In 

Used to test if a value is a member of a set 
Set 

Defines a set of up to 255 distinct values 


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Example code : Creating a variable containing only positive numbers 0 to 10 
var
evenNumbers : Set of 0..10;
i : Integer;
begin // Make sure that evenNumbers only contains even numbers
evenNumbers := [];
for i := 0 to 10 do
if (i mod 2) = 0
then Include(evenNumbers, i);
// Now display the set contents
for i := 0 to 10 do
if i in evenNumbers
then ShowMessage(IntToStr(i)+' is even');
end;

Show full unit code 
0 is even
2 is even
4 is even
6 is even
8 is even
10 is even



