package com.thealgorithms.conversions;
public final class IntegerToRoman {
private IntegerToRoman() {
}
private static final int[] ALL_ROMAN_NUMBERS_IN_ARABIC = new int[] {
1000,
900,
500,
400,
100,
90,
50,
40,
10,
9,
5,
4,
1,
};
private static final String[] ALL_ROMAN_NUMBERS = new String[] {
"M",
"CM",
"D",
"CD",
"C",
"XC",
"L",
"XL",
"X",
"IX",
"V",
"IV",
"I",
};
public static String integerToRoman(int num) {
if (num <= 0) {
return "";
}
StringBuilder builder = new StringBuilder();
for (int a = 0; a < ALL_ROMAN_NUMBERS_IN_ARABIC.length; a++) {
int times = num / ALL_ROMAN_NUMBERS_IN_ARABIC[a];
for (int b = 0; b < times; b++) {
builder.append(ALL_ROMAN_NUMBERS[a]);
}
num -= times * ALL_ROMAN_NUMBERS_IN_ARABIC[a];
}
return builder.toString();
}
public static void main(String[] args) {
System.out.println(IntegerToRoman.integerToRoman(2131));
}
}