Encyclopedia of answers to Golang beginners' doubts: Towards the top of technology

Golang is an open source programming language known for concurrency, memory safety, and cross-platform compatibility. As a beginner, you should install the Go toolchain and create a simple "Hello World" program. Built-in data types in Go include integers, floats, strings, and booleans. Control flow statements include if/else, for/while/range, and break/continue/return. Practical examples show how to build a simple HTTP server. Continuous exploration of the documentation and sample code will help you become a proficient Go developer.

Golang Beginner’s Encyclopedia of Doubts: Towards the Peak of Technology

Introduction

If you are a Golang beginner, you may be troubled by various problems. This guide aims to address these issues and provide you with a clear, comprehensive resource to ease you into your Golang development journey.

FAQ

1. What is Golang?

• Golang (also known as Go) is an open source programming language developed by Google in 2009.
• It is known for its concurrency, memory safety and cross-platform compatibility.

2. Why choose Golang?

• High concurrency processing capabilities, suitable for writing high-performance web services and distributed systems.
• Memory safety, helps prevent errors such as buffer overflows.
• Cross-platform compilation, can run on Windows, MacOS, Linux and other platforms.

3. How to get started?

• Install the Go tool chain: https://go.dev/doc/install
• Create a simple Hello World program:

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")
}

• Run this program: go run main.go

4. Variables and data types

• Variables are used to store data.

• Go has built-in data types, including:

  • int: integer
  • float64: floating point number
  • string: string
  • bool: Boolean value
• Use the var keyword to declare variables, for example: var name string

5. Control flow

• Conditional statements: if, else, switch
• Loop statements: for, while, range
• Jump statements: break, continue、return

Practical case

Build a simple HTTP server

package main

import (
    "fmt"
    "net/http"
)

func main() {
    // 处理 HTTP 请求
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, World!")
    })

    // 监听并服务于端口 8080
    if err := http.ListenAndServe(":8080", nil); err != nil {
        fmt.Println(err)
    }
}

Conclusion

Through this guide, you have mastered the basic knowledge of Golang development. Keep exploring the documentation, online tutorials, and sample code, and you'll be a proficient Go developer in no time.

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