Explain the use of Go's functions for organizing and encapsulating code logic?

Functions in Go are a fundamental part of the language and are used to encapsulate code logic into reusable blocks of code. They are declared using the **func** keyword, followed by the function name, a set of parameters (if any), and a return type (if any).

Here is an example of a simple function in Go that takes two integer parameters and returns their sum:

func add(x, y int) int {
    return x + y
}

Functions in Go can have any number of parameters, including zero. Parameters can have names and types, or they can be anonymous (type-only). Go also allows for variadic functions, which can take an arbitrary number of arguments.

Functions in Go can return one or more values. A function can have a named return value, which means that the function can simply return a value without specifying the variable name. Alternatively, a function can return multiple values by specifying them in a comma-separated list.

Go functions can also be anonymous, also known as lambda functions. Anonymous functions can be defined and assigned to variables or passed as arguments to other functions.

Functions in Go can also be used to organize code by creating packages that contain related functions. This allows for better code organization and separation of concerns. When importing a package, functions and variables can be accessed using the package name followed by a dot and the function or variable name.

Overall, functions in Go are a powerful tool for organizing and encapsulating code logic, making it more reusable and easier to maintain.