the new code without API( application programm interface).

Author: meneogbemi42-bit

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

@@ -1,14 +1,43 @@
-function getOrdinalNumber(num) {
-  return "1st";
-}
+//function getOrdinalNumber(num) {
+  //return "1st";
+//}
 
-module.exports = getOrdinalNumber;
+//module.exports = getOrdinalNumber;
 // this is a code i came up with to get the ordinal number of a given number. 
 // I will now write tests to check if it works correctly.
 
+//function getOrdinalNumber(n) {
+  //const pr = new Intl.PluralRules("en-US", { type: "ordinal" });
+  //const suffixes = { one: "st", two: "nd", few: "rd", other: "th" };
+  //const rule = pr.select(n);
+  //return `${n}${suffixes[rule]}`;
+//}
+
+// code without any API
+
 function getOrdinalNumber(n) {
-  const pr = new Intl.PluralRules("en-US", { type: "ordinal" });
-  const suffixes = { one: "st", two: "nd", few: "rd", other: "th" };
-  const rule = pr.select(n);
-  return `${n}${suffixes[rule]}`;
-}
+  // Pure arithmetic to get absolute value without Math.abs()
+  let positiveN;
+if (n < 0) {
+  positiveN = -n;
+} else {
+  positiveN = n;
+}
+  
+  const lastTwoDigits = positiveN % 100;
+  const lastDigit = positiveN % 10;
+
+  // Teens exception: 11th, 12th, 13th
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13) {
+    return `${n}th`;
+  }
+
+  // Standard endings
+  if (lastDigit === 1) return `${n}st`;
+  if (lastDigit === 2) return `${n}nd`;
+  if (lastDigit === 3) return `${n}rd`;
+
+  return `${n}th`;
+}
+
+module.exports = getOrdinalNumber;