What happens to the balance factor of an AVL tree after an insertion?

What happens to the balance factor of an AVL tree after an insertion?

Step 1: Understand what an AVL tree is. It is a type of binary search tree that maintains balance.
Step 2: Know that each node in an AVL tree has a balance factor, which is the difference between the heights of its left and right subtrees.
Step 3: The balance factor can be -1, 0, or 1 for a balanced AVL tree.
Step 4: When you insert a new node, the height of the tree may change, affecting the balance factors of the nodes.
Step 5: After the insertion, check the balance factors of the affected nodes starting from the inserted node up to the root.
Step 6: If any node has a balance factor of -2 or 2, it means the tree is unbalanced and needs rebalancing.
Step 7: Rebalancing can be done using rotations (single or double) to restore the balance of the tree.

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