Using a for Loop in C++ or Rust as a Reference Tool

This is really cool to be very handy when you're learning a new language or if you're well versed in another language and you have to use a different one. Like, I know C++, Rust sounds really cool. I want to learn Rust. What's what? You could read a book or you could kind of like skim code to source for C ++ and Rust side by side and get a kind of a decent idea of kind of how it works. And then jazz or maybe like taking some other method of learning, you can kind of use this as a reference tool. It's not an encyclopedia. So you kind of have to go in knowing like what kind of loop do