What are the various classifications of algorithms?

Algorithms can be classified in several ways, including by their design paradigm, such as divide and conquer, dynamic programming, greedy algorithms, and backtracking. They can also be categorized based on their purpose, such as search algorithms, sorting algorithms, and optimization algorithms. Additionally, algorithms can be distinguished by their complexity, specifically time complexity and space complexity, to evaluate their efficiency. Lastly, they may be classified based on their application domains, such as machine learning algorithms, cryptographic algorithms, and graph algorithms.