public/subjects/spelling

spelling

Instructions

In this exercise a number between 0 and 1000000 will be generated. Your purpose is to create the function spell that will spell the numbers generated.

So, if the program generates the number:

• 1 your function will return the string "one"
• 14 your function will return the string "fourteen".
• 96 your function will return the string "ninety-six"
• 100 your function will return the string "one hundred".
• 101 your function will return the string "one hundred one"
• 348 your function will return the string "one hundred twenty-three"
• 1002 your function will return the string "one thousand two".
• 1000000 your function will return the string "one million"

Only positive numbers will be tested. (Up to a million).

Notions

• patterns

Expected function

pub fn spell(n: u64) -> String {

}

Usage

Here is a program to test your function.

use spelling::*;

fn main() {
    println!("{}", spell(348));
    println!("{}", spell(9996));
}

And its output:

$ cargo run
three hundred forty-eight
nine thousand nine hundred ninety-six
$