int() function

I think this has something to do with it...

Print 1.5+2.5+3.5+4.5+5.5+6.5
Print Floor(1.5)+Floor(2.5)+Floor(3.5)+Floor(4.5)+Floor(5.5)+Floor(6.5)
Print Int(1.5)+Int(2.5)+Int(3.5)+Int(4.5)+Int(5.5)+Int(6.5)
WaitKey()