Go language: Read input from console

Approach 1: Using bufio.NewScanner

func readData(message string) string {

    fmt.Println(message)

    scanner := bufio.NewScanner(os.Stdin)

    scanner.Scan()

    if scanner.Err() != nil {

        return "Can't read input"

    }

    return scanner.Text()

}

App.go

package main

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

func readData(message string) string {
    fmt.Println(message)
    scanner := bufio.NewScanner(os.Stdin)
    scanner.Scan()

    if scanner.Err() != nil {
        return "Can't read input"
    }

    return scanner.Text()
}

func main() {
    userName := readData("Enter your name")
    city := readData("Enter your city")
    country := readData("Enter your country")

    fmt.Println("\nUser Entered\n")
    fmt.Println("User Name : ", userName)
    fmt.Println("City : ", city)
    fmt.Println("Country : ", country)
}

Output

Enter your name

Krishna

Enter your city

Bangalore

Enter your country

India

User Entered

User Name :  Krishna

City :  Bangalore

Country :  India

Approach 2: Using fmt.Scanln

var data string

fmt.Scanln(&data)

App.go

package main

import (
    "fmt"
)

func readData(message string) string {
    fmt.Println(message)
    var data string
    fmt.Scanln(&data)

    return data
}

func main() {
    userName := readData("Enter your name")
    city := readData("Enter your city")
    country := readData("Enter your country")

    fmt.Println("\nUser Entered\n")
    fmt.Println("User Name : ", userName)
    fmt.Println("City : ", city)
    fmt.Println("Country : ", country)
}

Output

Enter your name

Krishna

Enter your city

Bangalore

Enter your country

India

User Entered

User Name :  Krishna

City :  Bangalore

Country :  India

Approach 3: Using fmt.Scanf

var data string

fmt.Scanf("%s", &data)

App.go

package main

import (
    "fmt"
)

func readData(message string) string {
    fmt.Println(message)
    var data string
    fmt.Scanf("%s", &data)

    return data
}

func main() {
    userName := readData("Enter your name")
    city := readData("Enter your city")
    country := readData("Enter your country")

    fmt.Println("\nUser Entered\n")
    fmt.Println("User Name : ", userName)
    fmt.Println("City : ", city)
    fmt.Println("Country : ", country)
}

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