Reverse iterator in Rust

In Rust vectors support built in function to iterate called iter() the iter() function has a built in sub function called rev() this will change iterator to start from reverse. See below example and output:

Example of Reverse iterator for numbers

fn main() {
    let a = vec![1,2,3];
    for i in a.iter().rev() {
        println!("{}", i);
    }
}

Output

3
2
1

Example of Reverse iterator for Chars

fn main() {
    let a = vec!['T','E','S','O'];
    for i in a.iter().rev() {
        println!("{}", i);
    }
}

Output

O
S
E
T

Conclusion

In this page (written and validated by A. Gawali) you learned about Reverse iterator in Rust . What's Next? If you are interested in completing Rust tutorial, we encourage you simply to start here: Rust Tutorial.

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