"Modular Arithmetic" is a concise and accessible guide that demystifies the fundamental concepts of modular arithmetic, a mathematical framework essential for various applications. Tailored for students and enthusiasts of mathematics, the book explores the properties and operations within modular systems, shedding light on topics such as modular addition, subtraction, multiplication, and exponentiation. With clear explanations and illustrative examples, it equips readers with the foundational knowledge to solve problems in cryptography, computer science, and other mathematical disciplines. This handbook serves as an indispensable resource for understanding and applying modular arithmetic, making it an ideal companion for those looking to navigate this important mathematical concept.