Refactor getOrdinalNumber function to correctly return ordinal suffixes for numbers

Author: alexandru-pocovnicu

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -1,5 +1,15 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  let numberToString = String(num);
+  let numberLastDigit = numberToString[numberToString.length - 1];
+  let numberLast2Digits = numberToString.slice(numberToString.length - 2);
+
+  if (numberLastDigit === "1" && numberLast2Digits !== "11")
+    return numberToString + "st";
+  if (numberLastDigit === "2" && numberLast2Digits !== "12")
+    return numberToString + "nd";
+  if (numberLastDigit === "3" && numberLast2Digits !== "13")
+    return numberToString + "rd";
+  return numberToString + "th";
 }
 
 module.exports = getOrdinalNumber;