bitcoin_supply.rs

bitcoin_supply.rs

fn main() {
    let mut sum: u64 = 0;
    for x in 0..=32 {
        // Calculate the term inside the summation
        let term: f64 = (50.0 * 1e8) / (2.0_f64.powi(x as i32));
        println!("{} {}", x, term.to_string());
        // Take the floor of the result
        let floor_term: u64 = term.floor() as u64;
        // Add it to the sum
        sum += floor_term;
    }
    // Multiply by 210000 as per the formula
    let result = 210000 * sum;
    assert_eq!(result, 2099999997690000);
    println!("{}", result);
}

https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=44e636b2a749e49b4902977df88dcd18