User Input (bufio) in Go

April 28, 2022 Go

In this post, you will learn how to work with the user input (bufio) so that you can use that same knowledge and thus evolve.

the bufio library in conjunction with the function NewReader() and the function ReadString() have as main objective “extract” information given by the user;
in short, this same junction serves to increase interaction with it;

package main

import (
	"fmt"
	"bufio"
	"os"
	"strings"
)

func main() {
	userInput := bufio.NewReader(os.Stdin)

	fmt.Print("Enter your first name: ")
	firstName, _ := userInput.ReadString('\n')

	fmt.Print("Enter your last name: ")
	lastName, _ := userInput.ReadString('\n')

	fmt.Print("Enter your age: ")
	age, _ := userInput.ReadString('\n')

	/*
		CR+LF -> \r\n
		CR -> \r
		LF -> \n
	*/

	fmt.Printf("Name: %s %s\nAge: %s",
						 strings.ReplaceAll(firstName, "\r\n", ""),
						 strings.ReplaceAll(lastName, "\r\n", ""),
						 strings.ReplaceAll(age, "\r\n", ""))

Don’t forget to watch the video and you can always read this post in Portuguese.

User Input (bufio) in Go

Happy coding!