How to use the bytes.Buffer type to create and manipulate dynamic byte slices in Go?

To use the bytes.Buffer type to create and manipulate dynamic byte slices in Go, you can follow these steps:

Import the bytes package:
import "bytes"
Create a new bytes.Buffer object:
buf := bytes.NewBuffer(nil)
Write data to the buffer using the Write method:
buf.Write([]byte("Hello "))
Append data to the buffer using the Write or WriteString methods:
buf.WriteString("World")
Retrieve the byte slice from the buffer using the Bytes method:
data := buf.Bytes()
Convert the byte slice to a string (if needed) using the String method:
str := buf.String()
Manipulate or perform any necessary operations on the byte slice or string.
Clear the buffer using the Reset method to reuse it:
buf.Reset()

Here's a complete example that demonstrates these steps:

package main

import (
	"bytes"
	"fmt"
)

func main() {
	buf := bytes.NewBuffer(nil)

	// Write data to buffer
	buf.Write([]byte("Hello "))
	buf.WriteString("World")

	// Retrieve byte slice and convert to string
	data := buf.Bytes()
	str := buf.String()

	fmt.Println("Byte Slice:", data)
	fmt.Println("String:", str)

	// Clear/Reset buffer
	buf.Reset()
}

By using bytes.Buffer, you can dynamically create and manipulate byte slices efficiently in Go.