Here is an example of a for loop in Rust that counts from 1 to 5:

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

This will print the numbers 1 through 5 to the console.

Here is an example of an if statement in Rust that prints “positive” if a number is positive and “negative” if it is negative:

fn main() {
    let num = 10;
    if num > 0 {
        println!("positive");
    } else {
        println!("negative");
    }
}

This will print “positive” to the console.

And here is an example of a while loop in Rust that counts from 1 to 5:

fn main() {
    let mut i = 1;
    while i <= 5 {
        println!("{}", i);
        i += 1;
    }
}

This will also print the numbers 1 through 5 to the console.