number-master

native.js (571B)

---

 /**
  * @param {number} num
  * @returns {string}
  */
 export function nativeStringFromNumber(num) {
 	if (num <= 0) throw new Error("not a valid native korean number");
 	if (num > 99) throw new Error("number cannot be larger than 99")
 
 	const ONES = ["", "하나", "둘", "셋", "넷", "다섯", "여섯", "일곱", "여덟", "아홉"];
 	const TENS = ["", "열", "스물", "서른", "마흔", "쉰", "예순", "일흔", "여든", "아흔"];
 
 	const tens = Math.floor(num / 10);
 	const ones = num % 10;
 
 	if (tens === 0) return ONES[ones];
 	return TENS[tens] + ONES[ones];
 }