A high-energy manual for getting started with Golang technology: resolving novice confusion

Go language beginner's manual covers the following content: Installation and configuration: download the tool chain, set environment variables, and verify the installation. Basic syntax: variable declaration, function declaration, data types, control flow, arrays and slices. Concurrent programming: Go processes, channels, synchronization primitives. Data structures: map, slice, struct. Practical case: Create a simple web server and run it in the browser.

Go Technical Introductory Manual: Step by step to resolve the confusion of novices

Introduction

Go , a modern programming language developed by Google, is loved by developers for its high performance, ease of learning, and concurrency. This manual will take you into the world of Go programming and solve the confusion that novices often encounter.

Installation and Configuration

1. Download and install the Go language tool chain: https://golang.org/dl/
2. SettingsGOPATH Environment variable, pointing to the root directory of the Go workspace.
3. In the command line, run go version to verify that the installation was successful.

Basic syntax

The syntax of Go language is concise and clear:

• Variable declaration: var name type
• Function declaration: func funcName(params) returnType
• Data type: int, float, string, bool
• Control flow: if, for, switch
• Arrays and slices: []type, [length]type

Concurrent Programming

Go's largest One of the advantages is concurrent programming:

• Goroutine: lightweight thread that allows multiple tasks to be performed simultaneously.
• Channel: Pipe used to communicate between Goroutines.
• sync Package: Provides concurrency primitives such as mutex locks and condition variables.

Data structures

Go provides some common data structures:

• map: key Collection of value pairs
• slice: Dynamically sized array
• struct: Custom type, containing multiple fields

Practical case: Web server

Create a simple HTTP server:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    // 定义一个处理函数
    handler := func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, world!")
    }

    // 创建一个 HTTP 服务器
    srv := &http.Server{
        Addr:    ":8080",
        Handler: http.HandlerFunc(handler),
    }

    // 启动服务器
    err := srv.ListenAndServe()
    if err != nil {
        fmt.Println(err)
    }
}

Run this code, and then visit http:// in the browser localhost:8080, you will see the "Hello, world!" message. This simple case demonstrates the web programming capabilities of the Go language.

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