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Calculate size of a tree

Calculating the size of a tree means determining the total number of nodes in the tree. In simple terms, a tree is a data structure made up of nodes, where each node has a value and can have zero or more child nodes. The size of a tree refers to the total number of nodes present in the entire tree, including the root node, all its children, and their children, and so on. Counting the nodes of a tree is a common operation in computer science, and it can be useful in various applications such as analyzing algorithms, evaluating the complexity of a problem, or optimizing memory usage.

Count number of nodes in binary tree

Number of node in tree is called size of tree. Here given best solution of this problem which is solve by recursion.


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