This book demystifies the core mathematical principles that power modern Artificial Intelligence and Machine Learning. Going beyond simple algorithms, it provides a clear, conceptual, and practical understanding of the foundational math, including linear algebra, calculus, and probability. The book is structured to guide readers from the basics of data representation to the complexities of deep learning and large language models, providing a step-by-step journey through the essential mathematics. It is an indispensable guide for students, aspiring data scientists, and professionals seeking to build a solid theoretical foundation in the field.