diff --git a/codewars/7kyu/sum-the-array/koronya.js b/codewars/7kyu/sum-the-array/koronya.js
new file mode 100644
index 000000000..48792975f
--- /dev/null
+++ b/codewars/7kyu/sum-the-array/koronya.js
@@ -0,0 +1,7 @@
+// [JS][7kyu] Sum The Array
+// sum-the-array
+// https://www.codewars.com/kata/56bdf9d50d0b6433df001074/train/javascript
+
+Array.prototype.sum = function () {
+  return this.reduce((acc, curr) => acc + curr, 0)
+}