add implementation and correctly handle st, nd, rd, th suffixes including 11, 12, 13

Author: fayaz551

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

@@ -1,5 +1,15 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastTwo = num % 100; // handle teen exceptions
+  if (lastTwo === 11 || lastTwo === 12 || lastTwo === 13) {
+    return num + "th";
+  }
+
+  const lastDigit = num % 10;
+  if (lastDigit === 1) return num + "st";
+  if (lastDigit === 2) return num + "nd";
+  if (lastDigit === 3) return num + "rd";
+
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -47,7 +47,14 @@ test("should append 'th' for numbers ending with 11, 12, or 13", () => {
 });
 
 // Case 4: All other numbers
-test("should append 'th' for numbers that do not follow the 1, 2, 3 rule (e.g., 4, 5, 6...)", () => {
+
+ test("should append 'th' for numbers that do not follow the 1, 2, 3 rule", () => {
+  // Single digits 4-10
   expect(getOrdinalNumber(4)).toEqual("4th");
   expect(getOrdinalNumber(5)).toEqual("5th");
-});
+  expect(getOrdinalNumber(6)).toEqual("6th");
+  expect(getOrdinalNumber(7)).toEqual("7th");
+  expect(getOrdinalNumber(8)).toEqual("8th");
+  expect(getOrdinalNumber(9)).toEqual("9th");
+  expect(getOrdinalNumber(10)).toEqual("10th"); 
+ });