Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

fn main() {
    // Integer and float types
    let x: i32 = -42;
    let y: f64 = 3.14;
    let big: u128 = 340_282_366_920_938_463_463_374_607_431_768_211_455;
    println!("x={x}  y={y}  u128_max≈{big}");

// if as an expression
    let abs_x = if x < 0 { -x } else { x };
    println!("|{x}| = {abs_x}");

// Tuple and array
    let point: (i32, i32) = (10, 20);
    let rgb: [u8; 3] = [255, 128, 0];
    println!("point = ({}, {})", point.0, point.1);
    println!("red channel = {}", rgb[0]);

// loop with a return value
    let mut attempts = 0;
    let result = loop {
        attempts += 1;
        if attempts == 3 {
            break attempts * 10;
        }
    };
    println!("loop returned {result} after {attempts} attempts");

// for with a range and iterator adapters
    let sum: i32 = (1..=100).filter(|n| n % 2 == 0).sum();
    println!("Sum of even numbers 1..=100 = {sum}");

// while loop
    let mut n = 1u64;
    while n < 1_000 {
        n *= 2;
    }
    println!("First power of 2 >= 1000: {n}");
}