- Practice
- Interview Preparation Kit
- Trees
- Tree: Height of a Binary Tree

# Tree: Height of a Binary Tree

# Tree: Height of a Binary Tree

The height of a binary tree is the number of edges between the tree's root and its furthest leaf. For example, the following binary tree is of height :

**Function Description**

Complete the *getHeight* or *height* function in the editor. It must return the height of a binary tree as an integer.

getHeight or height has the following parameter(s):

*root*: a reference to the root of a binary tree.

**Note** -The Height of binary tree with single node is taken as zero.

**Input Format**

The first line contains an integer , the number of nodes in the tree.

Next line contains space separated integer where th integer denotes node[i].data.

**Note**: Node values are inserted into a binary search tree before a reference to the tree's root node is passed to your function. In a binary search tree, all nodes on the left branch of a node are less than the node value. All values on the right branch are greater than the node value.

**Constraints**

**Output Format**

Your function should return a single integer denoting the height of the binary tree.

**Sample Input**

**Sample Output**

```
3
```

**Explanation**

The longest root-to-leaf path is shown below:

There are nodes in this path that are connected by edges, meaning our binary tree's .