Basic input concepts in Go - Mini Project: Build & Apply

Basic Input Concepts in Go

📖 Scenario: You are creating a simple Go program that asks a user for their name and age, then greets them with this information.

🎯 Goal: Build a Go program that reads user input for name and age, then prints a greeting message including both.

📋 What You'll Learn

Use fmt.Scanln to read user input

Store the name in a variable called name

Store the age in a variable called age

Print the greeting using fmt.Printf with the exact format

💡 Why This Matters

🌍 Real World

Reading user input is essential for interactive command-line tools and simple programs that need user data.

💼 Career

Understanding basic input/output in Go is important for backend development, scripting, and building CLI applications.

1

Create variables for user input

Declare a variable called name of type string and a variable called age of type int.

Go

package main

import "fmt"

func main() {
    // Declare variables name and age
    // Your code here
}

Need a hint?

Use var keyword to declare variables with their types.

2

Read user input for name and age

Use fmt.Scanln to read input from the user into the variables name and age.

Go

package main

import "fmt"

func main() {
    var name string
    var age int
    // Read user input for name and age
    // Your code here
}

Need a hint?

Use fmt.Scanln(&variable) to read input into variables.

3

Create greeting message

Use fmt.Printf to print the message: Hello, [name]! You are [age] years old. replacing [name] and [age] with the variables name and age.

Go

package main

import "fmt"

func main() {
    var name string
    var age int
    fmt.Print("Enter your name: ")
    fmt.Scanln(&name)
    fmt.Print("Enter your age: ")
    fmt.Scanln(&age)
    // Print greeting message
    // Your code here
}

Need a hint?

Use %s for strings and %d for integers in fmt.Printf.

4

Run the program and see the output

Run the program and enter John for the name and 30 for the age. The program should print: Hello, John! You are 30 years old.

Go

package main

import "fmt"

func main() {
    var name string
    var age int
    fmt.Print("Enter your name: ")
    fmt.Scanln(&name)
    fmt.Print("Enter your age: ")
    fmt.Scanln(&age)
    fmt.Printf("Hello, %s! You are %d years old.\n", name, age)
    // Run and check output
    // Your code here
}

Need a hint?

Make sure to enter the exact inputs when running the program.