This third edition of Programming in C is designed for undergraduate students of engineering, computer applications, and computer science. It provides a comprehensive coverage of the fundamental concepts of C programming in solving real-world problems. The book starts with an introduction to programming and problem solving and then delves into a detailed introduction to C programming. The key topics include iterative and decision-control statements, functions, arrays, strings, pointers, structures and unions, file management, and pre-processor directives. It deals separately with the fundamental concepts of various data structures such as linked lists, stacks, queues, trees, and graphs. The book provides numerous case studies linked to the concepts explained in the text. The book is thoughtfully augmented with illustrative examples, insightful figures, detailed algorithms, invaluable programming insights, and skill-refining exercises. In essence, it emerges as the ultimate student companion, equipping them to attain mastery in crafting efficient and eloquent C programs.