Rust For Loop

Rust for loop

Created By: chatGPT

Rust provides a powerful and flexible way to iterate over collections using the for loop. This is particularly useful when you need to perform actions on each element of an array or a vector. The for loop in Rust can also be used with ranges, making it easier to iterate a certain number of times. Below is a basic example of a for loop that iterates over an array.

fn main() {
    let numbers = [1, 2, 3, 4, 5];

    for &number in &numbers {
        println!("Number: {}", number);
    }
}

In this example, we define an array of integers called numbers. The for loop iterates through each element of the array. Notice the use of &numbers to create a reference to the array, and &number to destructure the reference in each iteration. This prevents ownership issues and allows us to access the value directly as number. Each number is printed to the console.

You can also use a range to iterate a specific number of times. Here's how you can do that using the for loop with a range from 1 to 5.

fn main() {
    for i in 1..=5 {
        println!("Iteration: {}", i);
    }
}

In this case, the 1..=5 range includes both endpoints, allowing the loop to run from 1 through 5. The ..= operator indicates that the range is inclusive. This is particularly useful when you have a fixed number of iterations.

Combining for loops with collections is a common pattern in Rust. Here’s how you can use for loops with a vector, which is a growable array type in Rust.

fn main() {
    let mut vec_numbers = vec![10, 20, 30, 40, 50];

    for number in &vec_numbers {
        println!("Vector Number: {}", number);
    }
}

In summary, the for loop in Rust is versatile and can be adapted to various data types such as arrays, vectors, and ranges. Utilizing its capabilities can help you write clean and efficient code while performing iterative tasks.