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- Practice
- Data Structures
- Trees
- Tree: Level Order Traversal

# Tree: Level Order Traversal

# Tree: Level Order Traversal

Given a pointer to the root of a binary tree, you need to print the level order traversal of this tree. In level-order traversal, nodes are visited level by level from left to right. Complete the function and print the values in a single line separated by a space.

For example:

```
1
\
2
\
5
/ \
3 6
\
4
```

For the above tree, the level order traversal is .

**Input Format**

You are given a function,

```
void levelOrder(Node * root) {
}
```

**Constraints**

Nodes in the tree

**Output Format**

Print the values in a single line separated by a space.

**Sample Input**

```
1
\
2
\
5
/ \
3 6
\
4
```

**Sample Output**

1 2 5 3 6 4

**Explanation**

We need to print the nodes level by level. We process each level from left to right.

Level Order Traversal: .