Three dogs (Are there three dogs or one dog?) is a code snippet used to illustrate the lettercase sensitivity of the programming language. For a case-sensitive language, the identifiers dog, Dog and DOG are all different and we should get the output:

The three dogs are named Benjamin, Samba and Bernie.

For a language that is lettercase insensitive, we get the following output:

There is just one dog named Bernie.



Related task

 Unicode variable names


begin
    string(8) dog;
    dog := "Benjamin";
    begin
        string(8) Dog;
        Dog := "Samba";
        begin
            string(8) DOG;
            DOG := "Bernie";
            if DOG not = Dog
            or DOG not = dog
            then write( "The three dogs are named: ", dog, ", ", Dog, " and ", DOG )
            else write( "There is just one dog named: ", DOG )
        end
    end
end.