Why functions are needed in Go - See It in Action

Why functions are needed

📖 Scenario: Imagine you are baking cookies and you need to mix ingredients multiple times. Instead of mixing each time from scratch, you create a simple step called "mixing" that you can use whenever needed. This saves time and keeps your work neat.

🎯 Goal: You will create a small Go program that uses a function to repeat a task. This shows why functions help us avoid repeating code and make programs easier to read and change.

📋 What You'll Learn

Create a function called greet that prints a greeting message

Call the greet function three times

Use fmt.Println to print messages

Show how functions help avoid repeating the same code

💡 Why This Matters

🌍 Real World

Functions are like small helpers in real life. For example, a recipe step you repeat many times is like a function. It saves time and keeps things organized.

💼 Career

Knowing how to use functions is essential for any programming job. It helps you write clean, reusable code that others can understand and maintain easily.

1

Create a simple greeting message

Write a line of code that prints "Hello, welcome!" using fmt.Println.

Go

package main

import "fmt"

func main() {
    // Print "Hello, welcome!"
    // Your code here
}

Hint

Use fmt.Println("Hello, welcome!") inside the main function.

2

Create a function called greet

Create a function named greet that prints "Hello, welcome!" using fmt.Println. Add this function above main.

Go

package main

import "fmt"

// Create function greet that prints "Hello, welcome!"
// Your code here

func main() {
    fmt.Println("Hello, welcome!")
}

Hint

Define func greet() and put fmt.Println("Hello, welcome!") inside it.

3

Call the greet function three times

Remove the fmt.Println line from main. Instead, call the greet function three times inside main.

Go

package main

import "fmt"

func greet() {
    fmt.Println("Hello, welcome!")
}

func main() {
    // Call greet three times
    // Your code here
}

Hint

Inside main, write greet() three times, one after another.

4

Print the output to see the repeated greetings

Run the program to print the greeting message three times by calling greet() three times.

Go

package main

import "fmt"

func greet() {
    fmt.Println("Hello, welcome!")
}

func main() {
    greet()
    greet()
    greet()
    // Print output by running the program
    // Your code here
}

Hint

Run the program and see the greeting printed three times.