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Golang program to get the default buffer writer size

Here, we are going to learn how to get the default buffer writer size in Golang (Go Language)?
Submitted by Nidhi, on April 08, 2021 [Last updated : March 04, 2023]

Finding the default buffer writer size in Golang

Problem Solution:

In this program, we will get the default buffer writer size and print the result on the console screen.

Program/Source Code:

The source code to get the default buffer writer size is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

Golang code to get the default buffer writer size

// Golang program to get the default buffer
// writer size

package main

import "fmt"
import "os"
import "bufio"

func main() {
	filePtr, err := os.OpenFile("Demo.txt", os.O_WRONLY, 0666)

	if err != nil {
		fmt.Println(err)
	}

	//Create a buffer writter using file pointer.
	bufferedWriter := bufio.NewWriter(filePtr)

	BufferSize := bufferedWriter.Available()
	if err != nil {
		fmt.Println(err)
	}
	fmt.Printf("Default buffer size: %d\n", BufferSize)

	filePtr.Close()
}

Output:

Default buffer size: 4096

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt, os packages then we can use a function related to the fmt and os package.

Here, we also imported the bufio package to use buffer writer to write data into a file.

In the main() function, we opened the "Demo.txt" file and then get the default buffer writer size and print the result on the console screen.

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