implemented how special ordinal number cases like 11,12,13 are handled by making sure they always end in "th"

Author: CatchingKiyoko

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

@@ -1,5 +1,12 @@
 function getOrdinalNumber(num) {
-  return "1st";
+ const lastTwoDigits = num % 100; // gets the last two digits of the number because some like 11, 12, 13 are special cases.
+ const lastDigit= num % 10; // gets the last digit to decide if its going to be "St, Nd, Rd"
+
+ // handles special cases like "11,12,13" to always end in the "Th"
+ if (lastTwoDigits === 11 || lastTwoDigits === 12 || lastTwoDigits === 13){
+  return num + "St";
+}
+
 }
 
 module.exports = getOrdinalNumber;