import std;

print("How many numbers? ");
let n = read_num();

let mut sum = 0;

let mut i = 0;
while i < n {
    print("Enter number ");
    printn(i+1);
    println(": ");
    sum = sum + read_num();
    i = i + 1;
};

print("Average is: ");
printf32ln(sum as F32 / n as F32);