How to Convert a Map to a JSON String in Go

How to Convert a Map to a JSON String in Go ?

Answer

To convert a map to a JSON string in Go, you can use the json.Marshal function from the encoding/json package. This function converts a Go map into a JSON-encoded byte slice, which you can then convert to a string.

✐ Examples

1 Converting a Map to a JSON String

We can convert a map to a JSON string in Go using the json.Marshal function from the encoding/json package.

For example,

We start by importing the encoding/json and fmt packages.
We declare and initialize a map named myMap with key-value pairs.
We convert the map to a JSON-encoded byte slice using the json.Marshal function.
We convert the byte slice to a string.
We print the resulting JSON string to the console using the fmt.Println function.

Go Program

package main

import (
    "encoding/json"
    "fmt"
)

func main() {
    // Declare and initialize a map
    myMap := map[int]int{
        1: 10,
        2: 20,
        3: 30,
        4: 40,
        5: 50,
    }

    // Convert the map to a JSON-encoded byte slice
    jsonBytes, err := json.Marshal(myMap)
    if err != nil {
        fmt.Println(err)
        return
    }

    // Convert the byte slice to a string
    jsonString := string(jsonBytes)

    // Print the resulting JSON string
    fmt.Println("JSON string from map:", jsonString)
}

Output

JSON string from map: {"1":10,"2":20,"3":30,"4":40,"5":50}

Summary

In this tutorial, we learned How to Convert a Map to a JSON String in Go language with well detailed examples.

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