Convert integer to English [FINALIZED]
Given a non-negative integer up to $999\,999\,999$, write it in English.
The input number can be in any form other than English (though you'll typically want to use the native integer type of your language).
When there are several variants of writing the number in English, you can choose whichever suits you more. For example, the input $120$ may give the output
one hundred twenty or
one hundred and twenty.
The numbers must be formatted as follows:
Two-digit numbers must be written with dashes where applicable e.g.
powers of ten start with “one”, e.g.
one hundred, not just
The tens/ones part, if not zero, must be separated from the hundreds part with
two hundred and five, not
two hundred five.
The above rules are applied also to the factors of thousand and million.
moreover the global tens/ones part has bto be separated by
andwhenever anything larger is present, even if the hundreds part is missing.
Adjacent words must be separated by a single space, or a single dash without space where applicable.
Leading and/or trailing spaces are not allowed. However, if the result is printed, a single trailing newline (not preceded by any spaces) is allowed.
0 zero 1 one 4 four 10 ten 16 sixteen 42 forty-two 125 one hundred and twenty-five 1024 one thousand and twenty-four 1100 one thousand one hundred 12345 twelve thousand three hundred and forty-five 1000000 one million 1000001 one million and one 7023000 seven million twenty-three thousand 11012021 eleven million twelve thousand and twenty-one 999999999 nine hundred and ninety-nine million nine hundred and ninety-nine thousand nine hundred and ninety-nine