What is decision tree?

Decision tree is one of the fundamental topics in the field of data science and machine learning. Decision trees have been widely used for many years and represent a topic that data experts delve into deeply. Understanding decision trees is a crucial first step to grasp more complex techniques like XGBoost and Random Forests. Specifically, we will explore three of the most popular and widely applied decision tree algorithms: C4.5, classification trees, and regression trees.