mean.rs

use std::io;
fn main() {
    let N: usize;
    loop {
        println!("How many elements would you like to enter : ");
        let mut n = String::new();
        io::stdin().read_line(&mut n).expect("Input needed");
        match n.trim().parse::<usize>() {
            Ok(val) => {
                println!("N : {}", val);
                N = n
                    .trim()
                    .parse::<usize>()
                    .expect("Most unexpected scenario, World is about to end!");
                break;
            }
            Err(err) => {
                println!("Error {}", err);
                println!("Try again!");
            }
        }
    }
    let mut vector: Vec<f64> = Vec::new();
    let mut count = 0;
    loop {
        if count >= N {
            break;
        } else {
            let mut input = String::new();
            match io::stdin().read_line(&mut input) {
                Err(_) => {
                    println!("Give input!!");
                    continue;
                }
                Ok(_) => {
                    let n = input.trim().parse::<f64>();
                    match n {
                        Ok(val) => {
                            vector.push(val);
                            count += 1;
                        }
                        Err(_) => {
                            println!("Can't parse input: Try again");
                            continue;
                        }
                    }
                }
            }
        }
    }
    let sum = &vector.into_iter().sum::<f64>();
    let len = &vector.len();
}