Passed reverse single word

reverseString/reverseString.js

@@ -1,5 +1,14 @@
-const reverseString = function() {
+const reverseString = function(string) {
 
+    let revString = '';
+
+    for (let i = string.length - 1; i >= 0; i--) {
+        revString += string.charAt(i);
+    }
+
+    return revString;
 }
 
-module.exports = reverseString
+
+
+module.exports = reverseString