diff --git a/002.js b/002.js
new file mode 100644
index 0000000..5148e1f
--- /dev/null
+++ b/002.js
@@ -0,0 +1,16 @@
+var addTwoNumbers = function(l1, l2) {
+    let node = new ListNode('head')
+    let temp = node , sum , n = 0
+    while( l1 || l2 ){
+        const n1 = l1 ? l1.val : 0
+        const n2 = l2 ? l2.val : 0
+        sum = n1 + n2 + n
+        temp.next = new ListNode( sum % 10 )
+        temp = temp.next
+        n = parseInt( sum / 10 )
+        if(l1) l1 = l1.next
+        if(l2) l2 = l2.next
+    }
+    if( n > 0 ) temp.next = new ListNode(n)
+    return node.next
+};