我如何在GoLang中接受用户输入（fmt.scan）

Question

I can not take input from user in golang by use fmt.scan()

pls help me.

package main

import "fmt"

func main() {
    fmt.Print("Enter text: ")
    var input string
    e, _ := fmt.Scanln(&input)
    fmt.Println(input)
    fmt.Println(e)
}

image of code

after stop debuger: image of code

add err to Code, Nothing happened

func main() {
    fmt.Print("Enter text: ")
    var input string
    e, err := fmt.Scanln(&input)
    if err != nil {
        fmt.Fprintln(os.Stderr, err)
        return
    }
    fmt.Println(input)
    fmt.Println(e)
}

Image after add err in my Code . What is "not available" in Next line (after my Input value : "51213")

Answer 1

You code has no problem. If you build your code with go build and run the binary directly in a terminal, you will see your code runs.

The problem you hit is because of the Delve and vscode debug console. The vscode debug console doesn't support read from stdin. You can check this issue: Cannot debug programs which read from STDIN for details.