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GoLang Beginner FAQ: Installation Issues: Confirm that GoLang and Git are installed correctly. Variable declaration: Use var to declare a variable and use the assignment operator to initialize the variable. Arrays and slices: Arrays are of fixed length and are created using square brackets; slices are of dynamic length and are created using slice literals. Coroutine: lightweight thread, declared using the go keyword. Channel: used for communication between coroutines, declared using make(chan 7674b22ef33c73b930516fd6bc30b7a3). Hello World service: Create an HTTP service, use HandleFunc to handle requests, and use ListenAndServe to start the service.
As an excellent programming language, GoLang is deeply loved by developers. However, for beginners, it is inevitable that they will encounter some problems during the learning process. This article will collect some common questions asked by GoLang beginners and provide clear and easy-to-understand answers.
Error: go: command not found
Error: git: command not found
Git is an essential tool for GoLand development. Please use the following command to install Git:
brew install git
How to declare and initialize variables?
var i int // 声明一个无值的 int 型变量 i = 42 // 初始化变量
How to create arrays and slices?
Array:
arr := [5]int{1, 2, 3, 4, 5}
Slice:
slice := []int{1, 2, 3, 4, 5}
What is Goroutine?
Declaration Goroutine:
go func() { fmt.Println("Hello from goroutine!") }()
What is a channel?
Declaration channel:
ch := make(chan int)
Let us build a simple " Hello World" HTTP service to demonstrate the practical application of GoLand:
package main import ( "fmt" "net/http" ) func main() { http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, World!") }) http.ListenAndServe(":8080", nil) }
After running this code, you can visit http://localhost:8080
in the browser and you will see " Hello, World!" output.
Through this article, we have solved some common questions among GoLang beginners. We hope these answers can help you get started with GoLang easily.
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