editing the code

Author: Alaa-Tagi

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

@@ -1,19 +1,34 @@
 function getOrdinalNumber(num) {
-  num = num.toString();
-  const lastTwo = num.slice(-2);
-  const lastOne = num.slice(-1);
+  if (typeof num !== "number" || isNaN(num)) {
+    return "Invalid input";
+  }
+  const sign = num < 0 ? "-" : "";
+  num = Math.abs(num);
 
-  if (['11', '12', '13'].includes(lastTwo)) {
-    return num + 'th';
+  // Handle decimals
+  if (!Number.isInteger(num)) {
+    return sign + num + "th";
   }
 
+  const lastTwo = num % 100;
+  const lastOne = num % 10;
+
+  // Handle special cases 11th, 12th, 13th
+  if (lastTwo >= 11 && lastTwo <= 13) {
+    return sign + num + "th";
+  }
+
+  // Normal ordinal rules
   switch (lastOne) {
-    case '1': return num + 'st';
-    case '2': return num + 'nd';
-    case '3': return num + 'rd';
-    default:  return num + 'th';
+    case 1:
+      return sign + num + "st";
+    case 2:
+      return sign + num + "nd";
+    case 3:
+      return sign + num + "rd";
+    default:
+      return sign + num + "th";
   }
 }
 
-module.exports = getOrdinalNumber;
-
+module.exports = getOrdinalNumber;