@@ -0,0 +1,18 @@
+var inorderTraversal = function(root) {
+    let st = [];
+    let visited = [];
+    
+    while(root || st.length != 0) {
+        while(root != null){
+            st.push(root);
+            root = root.left;        
+        }
+        
+        root = st.pop();
+        visited.push(root.val);
+        
+        root = root.right;
+    }
+    
+    return visited;
+};