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JavaScript algorithm for converting integers to roman numbers
Let’s say, we are required to write a function, say intToRoman(), which, as the name suggests, returns a Roman equivalent of the number passed in it as an argument.
Let’s write the code for this function −
Example
const intToRoman = (num) => {
let result = "";
while(num){
if(num>=1000){
result += "M";
num -= 1000;
}else if(num>=500){
if(num>=900){
result += "CM";
num -= 900;
}else{
result += "D";
num -= 500;
}
}else if(num>=100){
if(num>=400){
result += "CD";
num -= 400;
}else{
result += "C";
num -= 100;
}
}else if(num>=50){
if(num>=90){
result += "XC";
num -= 90;
}else{
result += "L";
num -= 50;
}
}else if(num>=10){
if(num>=40){
result += "XL";
num -= 40;
}else{
result += "X";
num -= 10;
}
}else if(num>=5){
if(num>=9){
result += "IX";
num -= 9;
}else{
result += "V";
num -= 5;
}
}else{
if(num>=4){
result += "IV";
num -= 4;
}else{
result += "I";
num -= 1;
}
}
}
return result;
};
console.log(intToRoman(178));
console.log(intToRoman(89));
console.log(intToRoman(55));
console.log(intToRoman(1555));Output
The output for this code in the console will be −
CLXXVIII LXXXIX LV MDLV
Updated on: 21-Aug-2020
1K+ Views
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