Chapter 8: Functions in Rust

Functions are fundamental building blocks in any programming language. They allow you to encapsulate code for reuse, improve readability, and manage complexity. In Rust, functions are first-class citizens, and understanding how to define and use them is essential.

In this chapter, we'll explore functions in Rust in detail, covering:

  • Defining and calling functions
  • The main function
  • Parameters and return types
  • The return keyword and implicit returns
  • Function scope and visibility
  • Default parameters and named arguments
  • Slices and tuples as parameters and return types
  • Function pointers and higher-order functions
  • Nested functions and scope
  • Tail call optimization and recursion
  • Inlining functions
  • Generics in functions
  • Type inference for function return types
  • Method syntax and associated functions
  • Function overloading
  • Variadic functions and macros