Loop initialization, condition, update in Java - Mini Project: Build & Apply

Loop initialization, condition, update

📖 Scenario: You are helping a small shop owner count the total number of items sold in a day. The shop owner has a list of daily sales numbers for 5 different products.

🎯 Goal: Build a Java program that uses a for loop with proper initialization, condition, and update to sum the total items sold.

📋 What You'll Learn

Create an integer array called sales with exactly these values: 3, 7, 2, 5, 4

Create an integer variable called total and set it to 0

Use a for loop with int i = 0 as initialization, i < sales.length as condition, and i++ as update

Inside the loop, add sales[i] to total

Print the value of total after the loop

💡 Why This Matters

🌍 Real World

Counting totals from lists of numbers is common in stores, inventories, and reports.

💼 Career

Understanding loops and array processing is essential for software development and data handling jobs.

1

Create the sales data array

Create an integer array called sales with these exact values: 3, 7, 2, 5, 4

Java

// Create the sales array with values 3, 7, 2, 5, 4
// Your code here

Need a hint?

Use int[] sales = {3, 7, 2, 5, 4}; to create the array.

2

Initialize the total variable

Create an integer variable called total and set it to 0 inside the main method, below the sales array

Java

public class Main {
    public static void main(String[] args) {
        int[] sales = {3, 7, 2, 5, 4};
        // Create total variable and set to 0
        // Your code here
    }
}

Need a hint?

Write int total = 0; to start counting from zero.

3

Use a for loop to sum sales

Use a for loop with int i = 0 as initialization, i < sales.length as condition, and i++ as update. Inside the loop, add sales[i] to total

Java

public class Main {
    public static void main(String[] args) {
        int[] sales = {3, 7, 2, 5, 4};
        int total = 0;
        // Add a for loop to sum sales into total
        // Your code here
    }
}

Need a hint?

Use for (int i = 0; i < sales.length; i++) and inside add sales[i] to total.

4

Print the total items sold

Write a System.out.println statement to print the value of total after the loop

Java

public class Main {
    public static void main(String[] args) {
        int[] sales = {3, 7, 2, 5, 4};
        int total = 0;
        for (int i = 0; i < sales.length; i++) {
            total += sales[i];
        }
        // Print the total
        // Your code here
    }
}

Need a hint?

Use System.out.println(total); to show the total number of items sold.