You betray so much of what your programming environment is like, with that comment. Because, you see, if you can't behold the first x= expression on the same screen or, at very worst, the one above, then your code is majorly and deplorably fucked. It's utterly trashed and is in immediate need of repair. If scrolling back to the first x= expression is overwhelming and exhausting work for you, then the codebase that you work in is mutilated beyond belief and any immediate hope. You need to drop what you're doing, and get to unfucking you code right away so that you can have it in a comprehensible state that isn't dependent on reminding the reader on every single line what stuff is like. You need to learn to split things in smaller things that humans can understand as their own self-contained units of meaning. When you reach the balance of formulating the code in self-contained units that can be comprehended easily, you won't need type reminders on every line.

Not to mention that if you name your identifiers properly, you won't have to wonder what their type should be.