refactored get ordinal number

Author: Dipa-Sarker

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

@@ -1,19 +1,15 @@
 function getOrdinalNumber(num) {
-  let lastTwoDigits = num % 100;
-  if (lastTwoDigits === 11 || lastTwoDigits === 12 || lastTwoDigits === 13) {
-    return `${num}` + "th";
-  }
-  let lastDigit = num % 10;
-  if (lastDigit === 1) {
-    return `${num}` + "st";
-  } else if (lastDigit === 2) {
-    return `${num}` + "nd";
-  } else if (lastDigit === 3) {
-    return `${num}` + "rd";
+  const lastDigit = num % 10;
+  const lastTwoDigits = num % 100;
+  if (lastDigit === 1 && lastTwoDigits !== 11) {
+    return `${num}st`;
+  } else if (lastDigit === 2 && lastTwoDigits !== 12) {
+    return `${num}nd`;
+  } else if (lastDigit === 3 && lastTwoDigits !== 13) {
+    return `${num}rd`;
   } else {
-    return `${num}` + "th";
+    return `${num}th`;
   }
 }
 
-
 module.exports = getOrdinalNumber;