Explore TypeScript functions in this comprehensive tutorial for beginners. Learn about type aliases, literal types, basic function syntax, and functions without return values. Discover how to use the function keyword, create function type aliases, and implement function interfaces. Dive into optional parameters, default parameter values, and functions with rest parameters. Understand the 'never' type and its applications, and master custom type guards. Gain essential knowledge to enhance your TypeScript skills and improve your web development capabilities.