How to convert a string representation of a base64-encoded value to its decoded form using strconv in Golang?

To convert a string representation of a base64-encoded value to its decoded form using strconv package in Golang, you need to use the DecodeString function from the encoding/base64 package.

Here's an example of how to do it:

package main

import (
	"encoding/base64"
	"fmt"
	"log"
)

func main() {
	encodedString := "SGVsbG8gV29ybGQh"

	// Decoding the base64-encoded string
	decodedBytes, err := base64.StdEncoding.DecodeString(encodedString)
	if err != nil {
		log.Fatal("Error decoding base64 string:", err)
	}

	// Converting the decoded bytes to string
	decodedString := string(decodedBytes)

	fmt.Println(decodedString) // Output: "Hello World!"
}

In this example, the base64.StdEncoding.DecodeString function is used to decode the encodedString value. If there's an error during decoding, it will be logged using log.Fatal. The decodedBytes are then converted to a string using the string function, resulting in the decoded value "Hello World!".