Rust docs
Converts numbers into English words using the short scale.

Supports positive integers from 0 to 999999999999999_999.

Library function signature

rust pub fn shortscale(num: u64) -> String

Example

```rust use shortscale::shortscale;

asserteq!( shortscale(420000999015), "four hundred and twenty billion nine hundred \ and ninety nine thousand and fifteen" ); ```

For the JavaScript version see jldec/shortscale.