using .slice() instead of index to extract the last character

Author: djebsoft

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

@@ -2,13 +2,13 @@ function getOrdinalNumber(num) {
   let lastDigit = num % 10;
   let lastTwoDigits = num % 100;
   if (lastDigit === 1 && lastTwoDigits !== 11) {
-    // we also can use if (num[-1]==="1" && num.slice(-2)!=="11")
+    // we also can use if (num.slice(-1)==="1" && num.slice(-2)!=="11")
     return num + "st";
   } else if (lastDigit === 2 && lastTwoDigits !== 12) {
-    // we also can use if (num[-1]==="2" && num.slice(-2)!=="12")
+    // we also can use if (num.slice(-1)==="2" && num.slice(-2)!=="12")
     return num + "nd";
   } else if (lastDigit === 3 && lastTwoDigits !== 13) {
-    // we also can use if (num[-1]==="3" && num.slice(-2)!=="13")
+    // we also can use if (num.slice(-1)==="3" && num.slice(-2)!=="13")
     return num + "rd";
   } else {
     return num + "th";