How to iterate over a string character by character (by Unicode characters) in Rust?

Hi everyone! I just started learning Rust, and I'm having trouble iterating over a string. In other languages (like Python or C++), I'm used to strings being arrays of characters, and I can simply iterate by index or use a for loop. But in Rust, it's more complicated. Here's what I tried: ```rust let s = "Привет, мир!"; for c in s { println!("{}", c); } ``` The compiler gives an error: `error[E0277]: the trait bound \`str: Iterator\` is not satisfied`. I understand that `str` is not an iterator, but how do I get each character then? I also tried accessing by index: ```rust let s = "Привет"; println!("{}", s[0]); // Error! ``` And again an error: strings in Rust cannot be indexed directly because Unicode characters can take up different numbers of bytes. In the end, I'm