Why arrays are needed in Go - See It in Action

Why arrays are needed

📖 Scenario: Imagine you run a small bakery. Every day, you bake several types of bread. You want to keep track of how many loaves of each type you bake.

🎯 Goal: You will create a program that stores the number of loaves baked for different bread types using an array. This will help you see why arrays are useful to hold multiple related values together.

📋 What You'll Learn

Create an array to store the number of loaves baked for 3 types of bread

Use a variable to hold the total number of loaves baked

Use a loop to add up all the loaves from the array

Print the total number of loaves baked

💡 Why This Matters

🌍 Real World

Bakeries, stores, and many businesses need to track counts or measurements for multiple items daily.

💼 Career

Understanding arrays is fundamental for programming jobs that involve data storage, processing lists, or handling collections of information.

1

Create an array with bread loaves counts

Create an array called loaves of type int with length 3. Set the values to 10, 15, and 7 representing loaves baked for three bread types.

Go

// Create an array called loaves with values 10, 15, 7
// Your code here

Hint

Use the syntax varName := [length]type{values} to create an array with fixed size.

2

Create a variable to hold total loaves

Create an integer variable called total and set it to 0. This will hold the sum of all loaves baked.

Go

package main

func main() {
    loaves := [3]int{10, 15, 7}
    // Create an integer variable total and set it to 0
    // Your code here
}

Hint

Use total := 0 to create and initialize the variable.

3

Add all loaves using a for loop

Use a for loop with the variable i from 0 to 2 to add each element of loaves to total. Use total += loaves[i] inside the loop.

Go

package main

func main() {
    loaves := [3]int{10, 15, 7}
    total := 0
    // Use a for loop with i from 0 to 2 to add loaves[i] to total
    // Your code here
}

Hint

Use a classic for loop: for i := 0; i < 3; i++ { total += loaves[i] }

4

Print the total number of loaves baked

Use fmt.Println(total) to print the total number of loaves baked. Remember to import the fmt package at the top.

Go

package main

import "fmt"

func main() {
    loaves := [3]int{10, 15, 7}
    total := 0
    for i := 0; i < 3; i++ {
        total += loaves[i]
    }
    // Print the total variable
    // Your code here
}

Hint

Use fmt.Println(total) to show the total on the screen.