Using while Loops

Snippet

Using while Loops

While loops execute as long as a condition is true. They require manual counter updates unlike for loops. The example shows iterating through an array using an index variable with a while loop.

snippet.rs
rust
fn main() {
    let mut counter = 0;
    while counter < 3 {
        println!("Counter: {}", counter);
        counter += 1;
    }
    
    let numbers = [10, 20, 30, 40, 50];
    let mut index = 0;
    while index < numbers.len() {
        println!("Number at {}: {}", index, numbers[index]);
        index += 1;
    }
}

Breakdown

while counter < 3

Loop runs while counter is less than 3

while index < numbers.len()

Iterates using index until reaching array length

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