Hey, started looking at Swift today and I got a problem I can't explain. It sees so simple. look at the attached photo below. When I add the '++' Incrementation post I get this error. But when they are added pre var it is fine? I did a quick web search for the error messages but nothing that popped out at me. The error explanation that it is not a binary operator, I agree with. It's just supposed to increment the value by 1? It must be something simple???