Binary Tree Pre Order Traversing Code

PreOrder Traversing Code in BST:

=>

    public void printPreOrder(){
       
        if(root == null){
            return;
        }
       
        Stack stack = new Stack(numNodes);
       
        stack.push(root);
       
        while(! stack.isEmpty()){
           
            Node node = stack.pop();
            System.out.println(node.data);
           
            if(node.right ! = null){
                stack.push(node.right);
            }
            if(node.left != null){
                stack.push(node.left);
            }
        }
    }

Binary Tree Inorder Traversal

Code for Inorder Traversal:

=>

    public void printInOrder(){
      
        if(root == null){
            return;
        }
      
        Stack stack = new Stack(numNodes);
        Node node = root;
        while(node != null){
            stack.push(node);
            node = node.left;
        }
      
        while(! stack.isEmpty()){
          
            node = stack.pop();
            System.out.println(node.data);
            if(node.right != null){
                stack.push(node);
                node = node.left;
            }
          
        }
   }

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