Create script.js

Author: AdishiSood

Roman_Numeral_Converter/script.js

@@ -0,0 +1,46 @@
+const arabicInput = document.getElementById("arabicInput");
+const romanInput = document.getElementById("romanInput");
+
+arabicInput.addEventListener("input",(e)=>{
+    romanInput.value = arabicToRoman(e.target.value);
+});
+romanInput.addEventListener("input",(e)=>{
+    arabicInput.value = romanToArabic(e.target.value);
+
+});
+
+function arabicToRoman(number){
+    let roman = "";
+    const romanNumList = {M:1000,CM:900, D:500,CD:400, C:100, XC:90,L:50, XV: 40, X:10, IX:9, V:5, IV:4, I:1};
+    let a;
+    if(number > 3999)
+        return "Enter a number between 1 and 3999";
+    else{
+        for(let key in romanNumList){
+            a = Math.floor(number / romanNumList[key]);
+            if(a >= 0){
+                for(let i = 0; i < a; i++){
+                    roman += key;
+                }
+            }
+            number = number % romanNumList[key];
+        }
+    }
+
+    return roman;
+}
+function romanToArabic(romanNumber){
+    romanNumber = romanNumber.toUpperCase();
+    const romanNumList = ["CM","M","CD","D","XC","C","XL","L","IX","X","IV","V","I"];
+    const corresp = [900,1000,400,500,90,100,40,50,9,10,4,5,1];
+    let index =  0, num = 0;
+    for(let rn in romanNumList){
+        index = romanNumber.indexOf(romanNumList[rn]);
+        while(index != -1){
+            num += parseInt(corresp[rn]);
+            romanNumber = romanNumber.replace(romanNumList[rn],"-");
+            index = romanNumber.indexOf(romanNumList[rn]);
+        }
+    }
+    return num;
+}