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freeCodeCamp/guide/chinese/go/go-functions/index.md
2018-10-16 21:32:40 +05:30

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---
title: Go Functions
localeTitle: 去功能
---
## 去功能
函数是在调用任务时执行任务的代码块,这样函数的名称就可以识别它并用于调用函数。
函数的声明以关键字`func`开头,后跟函数的名称,然后是函数的参数,最后是返回的值类型。声明将函数名称绑定到函数。请记住,类型位于参数和返回值中的变量名之后。函数声明的示例如下
```go
func add(a int, b int) int
```
函数可以有0个或多个参数具体取决于其所需的功能
```go
func zero() int { /* Function Definition */ }
func increment(x int) int { /* Function Definition */ }
func add(x, y int) int { /* Function Definition */ }
```
Go支持返回多个值。下面的函数返回2个值2个参数的总和以及第一个和第二个参数之间的差异
```go
func addAndSubtract(x, y int) (int, int) {
return x + y, x - y
}
addAndSubtract(7, 4) // Returns 11, 3
```
Go还支持命名返回的值
```go
func mulitplyByThreeAndDivideByFive(x int) (product int, quotient int) {
product = x * 3
quotient = x / 5
return
}
mulitplyByThreeAndDivideByFive(20) // Returns 60, 4
```
#### 更多信息:
* [围棋之旅](https://tour.golang.org/basics/4)
* [以身作则](https://gobyexample.com/functions)
* [Golang Book](https://www.golang-book.com/books/intro/7)
* [Go编程语言规范](https://golang.org/ref/spec#Function_declarations)