Rust Loops

ExampleRust

fn main() {
    for i in 1..=3 {
        println!("for {}", i);
    }

    let mut n = 3;
    while n > 0 {
        println!("while {}", n);
        n -= 1;
    }

    let mut count = 0;
    let found = loop {
        count += 1;
        if count == 4 {
            break count * 10;
        }
    };
    println!("{}", found);

    for (i, c) in "Rs".chars().enumerate() {
        println!("{} {}", i, c);
    }
}

Output

for 1
for 2
for 3
while 3
while 2
while 1
40
0 R
1 s

1..=3 is a range including 3. loop repeats forever until you break, and break can even hand back a value.

Quick check

Which range includes both ends?

1..31..=31...3

Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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