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roman.js
executable file
·37 lines (36 loc) · 923 Bytes
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roman.js
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function convertToRoman(num) {
var l = ['I','V','X','L','C','D','M','O','Z'];
num = num.toString().split('').reverse();
var start = 0;
var final = [];
for (var i = 0; i < num.length; i++) {
var tempResult = "";
var n = num[i];
switch (n) {
case "1":case "2":case "3":
for (var j = 0; j < +n; j++) {
tempResult += l[start];
}
break;
case "4":
tempResult = l[start] + l[start+1];
break;
case "5":
tempResult = l[start+1];
break;
case "6":case "7":case "8":
tempResult = l[start+1];
for (var j = 0; j < (+n)-5; j++) {
tempResult += l[start];
}
break;
case "9":
tempResult = l[start] + l[start+2];
break;
}
start += 2;
final.push(tempResult);
}
return final.reverse().join('');
}
convertToRoman(36);