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.