While loop execution flow in Java - Mini Project: Build & Apply

While loop execution flow

📖 Scenario: You are helping a cashier count the number of customers entering a store until the store closes.

🎯 Goal: Build a Java program that uses a while loop to count customers until the store closes.

📋 What You'll Learn

Create an integer variable customers starting at 0

Create an integer variable maxCustomers set to 5

Use a while loop with the condition customers < maxCustomers

Inside the loop, increase customers by 1 each time

Print the final number of customers after the loop ends

💡 Why This Matters

🌍 Real World

Counting customers or events until a limit is reached is common in stores, games, or data processing.

💼 Career

Understanding loop execution flow is essential for programming tasks like automation, simulations, and user input handling.

1

Create the initial variable customers

Create an integer variable called customers and set it to 0.

Java

// Your code here

Need a hint?

Use int customers = 0; to create the variable.

2

Add the variable maxCustomers

Add an integer variable called maxCustomers and set it to 5.

Java

public class Main {
    public static void main(String[] args) {
        int customers = 0;
        // Your code here
    }
}

Need a hint?

Use int maxCustomers = 5; to set the limit.

3

Write the while loop to count customers

Write a while loop with the condition customers < maxCustomers. Inside the loop, increase customers by 1 using customers++;.

Java

public class Main {
    public static void main(String[] args) {
        int customers = 0;
        int maxCustomers = 5;
        // Your code here
    }
}

Need a hint?

Use while (customers < maxCustomers) { customers++; } to count customers.

4

Print the final number of customers

Write System.out.println(customers); to print the final number of customers after the while loop.

Java

public class Main {
    public static void main(String[] args) {
        int customers = 0;
        int maxCustomers = 5;
        while (customers < maxCustomers) {
            customers++;
        }
        // Your code here
    }
}

Need a hint?

Use System.out.println(customers); to show the count.