How to hash a string using SHA-256 in Go?

To hash a string using SHA-256 in Go, you can use the crypto/sha256 package. Here is an example code snippet that demonstrates how to accomplish this:

package main

import (
	"crypto/sha256"
	"encoding/hex"
	"fmt"
)

func main() {
	str := "Hello, World!" // the string to be hashed

	// Create a new SHA256 hash
	hash := sha256.New()

	// Write the string to the hash
	hash.Write([]byte(str))

	// Get the finalized hash result as a byte slice
	hashBytes := hash.Sum(nil)

	// Convert the byte slice to a hexadecimal string
	hashString := hex.EncodeToString(hashBytes)

	// Print the SHA256 hash
	fmt.Println(hashString)
}

This code:

Imports necessary packages (crypto/sha256, encoding/hex, and fmt).
Defines the string to be hashed ("Hello, World!").
Creates a new SHA256 hash using sha256.New().
Writes the string to be hashed to the hash using hash.Write([]byte(str)).
Gets the finalized hash result as a byte slice using hash.Sum(nil).
Converts the byte slice to a hexadecimal string using hex.EncodeToString(hashBytes).
Prints the resulting SHA256 hash using fmt.Println(hashString).

When you run this code, it will output the SHA256 hash of the string "Hello, World!".