height of a binary tree

1int height(Node* root)
2{
3    // Base case: empty tree has height 0
4    if (root == nullptr)
5        return 0;
6 
7    // recur for left and right subtree and consider maximum depth
8    return 1 + max(height(root->left), height(root->right));
9}
10

1// finding height of a binary tree in c++.
2int maxDepth(node* node)  
3{  
4    if (node == NULL)  
5        return 0;  
6    else
7    {  
8        /* compute the depth of each subtree */
9        int lDepth = maxDepth(node->left);  
10        int rDepth = maxDepth(node->right);  
11      
12        /* use the larger one */
13        if (lDepth > rDepth)  
14            return(lDepth + 1);  
15        else return(rDepth + 1);  
16    }  
17}  

1# define a Class Tree, to intiate the binary tree
2class TreeNode:
3    def __init__(self, val):
4        self.val = val
5        self.left = None
6        self.right = None
7 
8def height(root):
9 
10    # Check if the binary tree is empty
11    if root is None:
12        # If TRUE return 0
13        return 0 
14    # Recursively call height of each node
15    leftAns = height(root.left)
16    rightAns = height(root.right)
17 
18    # Return max(leftHeight, rightHeight) at each iteration
19    return max(leftAns, rightAns) + 1
20 
21# Test the algorithm
22root = TreeNode(1)
23root.left = TreeNode(2)
24root.right = TreeNode(3)
25root.left.left = TreeNode(4)
26 
27print("Height of the binary tree is: " + str(height(root)))
28