# When should recursive functions be used in Python?

Recursion functions can be used in the following scenarios:

- Recursion functions work well to solve problems when they can be broken down into smaller similar problems.
- The recursive function can easily implement solutions when the problems are solved using divide and conquer or dynamic programming strategies.
- When the structure of the program aligns with the approach of solving problems recursively, recursive functions can reduce the complexity of the code.
- Recursive functions can be used to traverse and manipulate tree structures, such as the preorder, inorder, and postorder traversal of binary trees.
- Recursion functions can effectively solve certain mathematical problems such as the Fibonacci sequence and factorial.
- Recursive functions are also very useful when dealing with problems such as depth-first search (DFS) in graphs.