Online documentation and tutorials for golang functions

Go functions are blocks of code that receive input, perform operations, and return output. They are an important part of organizing and reusing code. Online documentation can be accessed through the official Go website: [https://pkg.go.dev](https://pkg.go.dev) For more in-depth explanations and examples, there are many online tutorials available for learning Go functions: [ Functions](https://go.dev/tour/methods-and-interfaces/#TOC_6)、[Go Functions](https://www.realfav.com/book/learn-Go/chapter_9-Functions)

Online documentation and tutorials for Go functions

Go functions are blocks of code that receive input, perform operations, and return output. They are an important part of organizing and reusing code in the Go programming language.

Function online documentation

The best way to view function online documentation is to use the Go official website: [https://pkg.go.dev](https:/ /pkg.go.dev).

• Example: To find documentation for the fmt.Printf function, visit [fmt.Printf](https://pkg.go.dev/ fmt#Printf) page.

Function Tutorials

For more in-depth explanations and examples, there are many online tutorials available for learning Go functions:

• Official document tutorial: [Function](https://go.dev/tour/methods-and-interfaces/#TOC_6)
• Realfav Tutorial: [Go Functions](https://www.realfav.com/book/learn-Go/chapter_9-Functions)

Practical case

• Generate random numbers: func rand.Intn(n int) int
• Read command line parameters: func os.Args
• Format string: func fmt.Printf(format string, args ...interface{}) (n int, err error)

Usage Example

// 导入必要的包
import (
    "fmt"
    "math/rand"
    "os"
)

// 定义一个函数
func main() {
    // 生成随机数字
    num := rand.Intn(100)
    
    // 获取命令行参数
    args := os.Args
    
    // 格式化字符串
    output := fmt.Sprintf("随机数字：%d，命令行参数：%v", num, args)
    
    // 打印输出
    fmt.Println(output)
}

This example defines a main function that generates a random number, gets command line arguments, and formats string. It shows the use of Go functions, including rand.Intn, os.Args, and fmt.Sprintf.

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