How do I encode data to JSON in Go?

How do I encode data to JSON in Go?

In Go, you can use the encoding/json package to encode data to JSON. You can use the json.Marshal function for this.

Can you show me a simple example?

Sure! Here's a basic example:

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    p := Person{Name: "Alice", Age: 30}
    jsonData, err := json.Marshal(p)
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println(string(jsonData))
}

What does the json:"name" part do?

The json:"name" part is a struct tag that specifies the key name in the JSON output. It tells the encoder to use "name" as the key for the Name field.

Can I encode a map to JSON as well?

Yes, you can encode a map to JSON using the same json.Marshal function. Just pass the map to it, and it will convert it to JSON format.