52 lines
1.3 KiB
C#
52 lines
1.3 KiB
C#
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public class Solution {
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private static readonly List<(int value, string word)> NUMBERS = new List<(int value, string word)>() {
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(1000000000, "Billion"),
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(1000000, "Million"),
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(1000, "Thousand"),
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(100, "Hundred"),
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(90, "Ninety"),
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(80, "Eighty"),
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(70, "Seventy"),
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(60, "Sixty"),
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(50, "Fifty"),
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(40, "Forty"),
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(30, "Thirty"),
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(20, "Twenty"),
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(19, "Nineteen"),
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(18, "Eighteen"),
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(17, "Seventeen"),
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(16, "Sixteen"),
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(15, "Fifteen"),
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(14, "Fourteen"),
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(13, "Thirteen"),
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(12, "Twelve"),
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(11, "Eleven"),
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(10, "Ten"),
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(9, "Nine"),
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(8, "Eight"),
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(7, "Seven"),
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(6, "Six"),
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(5, "Five"),
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(4, "Four"),
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(3, "Three"),
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(2, "Two"),
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(1, "One"),
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};
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public string NumberToWords(int num) {
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if (num == 0) {
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return "Zero";
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}
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foreach (var (value, word) in NUMBERS) {
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if (num >= value) {
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var prefix = (num >= 100) ? NumberToWords(num / value) + " " : "";
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var suffix = (num % value == 0) ? "" : " " + NumberToWords(num % value);
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return prefix + word + suffix;
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}
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}
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return "";
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}
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}
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