Why loops are needed in Go - See It in Action

Why loops are needed

📖 Scenario: Imagine you have a list of fruits and you want to say hello to each fruit. Doing this one by one is slow and boring. Loops help us say hello to all fruits quickly and easily.

🎯 Goal: You will create a list of fruits, set up a counter, use a loop to greet each fruit, and finally print all greetings.

📋 What You'll Learn

Create a slice called fruits with these exact values: "apple", "banana", "cherry"

Create an empty slice of strings called greetings

Use a for loop with index i to go through fruits

Inside the loop, add a greeting like "Hello, apple!" to greetings

Print each greeting from greetings using a for loop

💡 Why This Matters

🌍 Real World

Loops are used in many programs to handle lists of items, like showing all messages, processing orders, or checking data.

💼 Career

Understanding loops is essential for any programming job because they help automate repetitive tasks efficiently.

1

Create the list of fruits

Create a slice called fruits with these exact values: "apple", "banana", "cherry"

Go

# Create the slice fruits with "apple", "banana", "cherry"
# Your code here

Need a hint?

Use fruits := []string{"apple", "banana", "cherry"} to create the slice.

2

Create an empty greetings slice

Create an empty slice of strings called greetings to store greetings

Go

package main

func main() {
    fruits := []string{"apple", "banana", "cherry"}
    // Create an empty slice greetings
    // Your code here
}

Need a hint?

Use greetings := []string{} to create an empty slice.

3

Use a loop to create greetings

Use a for loop with index i to go through fruits. Inside the loop, add a greeting like "Hello, apple!" to greetings

Go

package main

import "fmt"

func main() {
    fruits := []string{"apple", "banana", "cherry"}
    greetings := []string{}
    // Use a for loop with i to go through fruits
    // Add "Hello, !" to greetings inside the loop
    // Your code here
}

Need a hint?

Use for i := 0; i < len(fruits); i++ and inside the loop use append with fmt.Sprintf to add greetings.

4

Print all greetings

Use a for loop with variable _, greeting to go through greetings and print each greeting

Go

package main

import "fmt"

func main() {
    fruits := []string{"apple", "banana", "cherry"}
    greetings := []string{}
    for i := 0; i < len(fruits); i++ {
        greetings = append(greetings, fmt.Sprintf("Hello, %s!", fruits[i]))
    }
    // Use a for loop with _, greeting to print each greeting
    // Your code here
}

Need a hint?

Use for _, greeting := range greetings and fmt.Println(greeting) to print each greeting.