Go语言程序错误[关闭]

Question

I am a new Go Language programmer. Below is my program but I am getting this error:

#command-line-arguments
    .\helloworld.go:20: undefined: json.Marshall

Can anyone tell why I get the error?

package main

import (
    "encoding/json"
    "fmt"
    "net/http"
)

type API struct {
    Message string "json:message"
}

func main() {

    http.HandleFunc("/api", func(w http.ResponseWriter, r *http.Request) {

        message := API{"Hello, World!!!"}

        output, err := json.Marshall(message)

        if err != nil {
            fmt.Println("Something went wrong")
        }

        fmt.Fprintf(w, string(output))

    })

    http.ListenAndServe(":8080", nil)

}

Answer 1

The output clearly tells you what is your problem.

undefined: json.Marshall

means that there is no method with this name. On the other side looking at the documentation the method is called

func Marshal(v interface{}) ([]byte, error)

So just use a correct name and learn how to debug because debugging is really important in software engineering.