diff --git a/uebung10/api.php b/uebung10/api.php
index 31e22c7..7e0657c 100644
--- a/uebung10/api.php
+++ b/uebung10/api.php
@@ -13,7 +13,7 @@ if (isset($_GET['n'])) {
 $questions = $db->getQuestions($n);
 
 $fullarray[] = [];
-for ($i = 0; $i < len($questions); $i++) {
+for ($i = 0; $i < count($questions); $i++) {
         $answers[] = array($questions['answer0'], $questions['answer1'], $questions['answer2']);
         $jsonarray[] = array("id" => $questions['id'], "answers" => $answers, "solution" => $questions['solution']);
         $fullarray[] = $jsonarray;