The programming language often used for machine learning is Python. Its simplicity and readability make it accessible for practitioners and researchers alike. Python offers a rich ecosystem of libraries and frameworks, such as TensorFlow, Keras, and scikit-learn, which facilitate the development of machine learning models. These tools provide functions for data manipulation, model training, and evaluation, enabling users to implement complex algorithms with relative ease. Its popularity makes Python a preferred choice for many in the machine learning community.