## Q. Program to implement Binary Tree using the linked list

### Explanation

In this program, we need to create the binary tree by inserting nodes and displaying nodes in inorder fashion. A typical binary tree can be represented as follows:

In the binary tree, each node can have at most two children. Each node can have zero, one or two children. Each node in the binary tree contains the following information:

**Data** that represents value stored in the node.

**Left** that represents the pointer to the left child.

**Right** that represents the pointer to the right child.

### Algorithm

- Define Node class which has three attributes namely:
**data left**and**right**. Here, left represents the left child of the node and right represents the right child of the node. - When a node is created, data will pass to data attribute of the node and both left and right will be set to
**null**. - Define another class which has an attribute root.
**Root**represents the root node of the tree and initialize it to null.

- insert() will add a new node to the tree:
- It checks whether the root is null, which means the tree is empty. It will add the new node as root.
- Else, it will add root to the queue.
- The variable node represents the current node.
- First, it checks whether a node has a left and right child. If yes, it will add both nodes to queue.
- If the left child is not present, it will add the new node as the left child.
- If the left is present, then it will add the new node as the right child.

- Inorder() will display nodes of the tree in inorder fashion.
- It traverses the entire tree then prints out left child followed by root then followed by the right child.

### Solution

### Python

**Output:**

Binary tree after insertion 1 Binary tree after insertion 2 1 3 Binary tree after insertion 4 2 5 1 3 Binary tree after insertion 4 2 5 1 6 3 7

### C

**Output:**

Binary tree after insertion 1 Binary tree after insertion 2 1 3 Binary tree after insertion 4 2 5 1 3 Binary tree after insertion 4 2 5 1 6 3 7

### JAVA

**Output:**

Binary tree after insertion 1 Binary tree after insertion 2 1 3 Binary tree after insertion 4 2 5 1 3 Binary tree after insertion 4 2 5 1 6 3 7

### C#

**Output:**

### PHP

**Output:**

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