Explain the use of Go functions for encapsulating code logic?

In Go, a function is a named sequence of statements that can be called by other parts of the program to perform a specific task. Functions are the basic building blocks of Go programs and are used extensively to encapsulate and reuse code logic.

A function in Go is defined using the **func** keyword, followed by the function name, a list of zero or more input parameters enclosed in parentheses, and an optional return type. The basic syntax of a Go function is as follows:

func functionName(parameter1 type, parameter2 type) returnType {
    // function body
    return result
}

Here, **functionName** is the name of the function, **parameter1** and **parameter2** are the input parameters of the function, ****returnType**** is the type of the value returned by the function, and **result** is the value returned by the function.

Go functions can also have multiple return values, which are specified in the function signature using parentheses. For example:

func swap(x, y int) (int, int) {
    return y, x
}

This function takes two integers as input parameters and returns them in reverse order.

Functions in Go can be defined at the package level or at the block level. Package-level functions are defined outside of any block, while block-level functions are defined inside a block, such as a loop or an if statement.

In summary, Go functions are a fundamental concept in Go programming and are used extensively to encapsulate and reuse code logic.