Textbook in PDF format Discrete Mathematics is a comprehensive and student-friendly text that explores the fundamental concepts and techniques underlying modern computer science, mathematics, and engineering. The book introduces readers to the essential building blocks of discrete structures, such as logic, sets, relations, functions, combinatorics, and graph theory, while also covering advanced topics like recurrence relations, Boolean algebra, and automata theory. Designed with clarity and accessibility in mind, the book blends theory with practical examples, solved problems, and exercises to strengthen understanding and problem-solving skills. Each chapter emphasizes both the mathematical foundations and their wide-ranging applications in computing, data analysis, cryptography, algorithms, and network design. This book is ideal for undergraduate students of computer science, engineering, and mathematics, as well as educators and professionals seeking a reliable reference. With its structured approach and balanced focus on concepts and applications, Discrete Mathematics provides readers with the tools and insights necessary to grasp this vital subject and apply it effectively in academic and professional contexts