added a parameter to the function

I used the .split, .reverse and .join method to be able to reverse the string
created a variable that holds the reversed string

03_reverseString/reverseString.js

@@ -1,6 +1,10 @@
-const reverseString = function() {
-
+const reverseString = function(string) {
+    let enteredWord = string.split("").reverse().join("");
+    return enteredWord
 };
-
+reverseString("hello")
+reverseString("hello there")
+reverseString('!abc 123!')
+reverseString('')
 // Do not edit below this line
 module.exports = reverseString;