Update bst_search.py

trees/bst_search.py

@@ -2,14 +2,31 @@
 # -*- coding: utf-8 -*-
 # author: bt3gl
 
-def search_bst(root, val):
+def search_bst_recursive(root, val):
         
         if root is None or root.val == val:
             return root
         
         if val > root.val:
-            return search_bst(root.right, val)
+            return search_bst_recursive(root.right, val)
         
         else:
-            return search_bst(root.left, val) 
+            return search_bst_recursive(root.left, val) 
+
+
         
+def search_bst_iterative(root, val):
+        
+        node = root
+        while node:
+            
+            if node.val == val:
+                return node
+
+            if node.val < val:
+                node = node.right
+
+            else:
+                node = node.left
+        
+        return False