My Rust Deck

Beginner - Basics

Question:

How do you use a for loop in Rust?

Answer:

fn main() {
    // Iterate over a range
    for i in 0..5 {
        println!("i = {}", i);  // 0, 1, 2, 3, 4
    }

    // Inclusive range
    for i in 1..=3 {
        println!("i = {}", i);  // 1, 2, 3
    }

    // Iterate over array
    let arr = [10, 20, 30];
    for element in arr {
        println!("Value: {}", element);
    }
}

Copy, paste and run the code above in Rust Playground.

for loops over iterators. Use .. for exclusive range, ..= for inclusive.

Read more in TRPL - Looping Through a Collection with for.