passed reverses single word

reverseString/reverseString.js

@@ -1,5 +1,17 @@
-const reverseString = function() {
+const reverseString = function(inputString) {
+
+    let stringLength = inputString.length;
+    let revString = ''
+
+    for (let i = stringLength; i >= 0; i--) {
+        if (revString === 'undefined') {
+            revString = ''
+        }
+        revString = revString + inputString[i];
+    }
+
+    return revString;
 
 }
 
-module.exports = reverseString
+module.exports = reverseString