Implemented repeat function

Author: ike-agu

Sprint-3/3-mandatory-practice/implement/repeat.js

@@ -1,5 +1,10 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    return "Negative numbers are not valid!";
+  } else {
+    return str.repeat(count);
+  }
 }
 
-module.exports = repeat;
+console.log(repeat("hello", 10));
+module.exports = repeat;