For loop execution model in PHP - Mini Project: Build & Apply

For loop execution model

📖 Scenario: You are helping a small shop owner count how many items they have in stock. They have a list of item quantities and want to add them up using a for loop.

🎯 Goal: Build a PHP program that uses a for loop to add up all the quantities in an array and print the total.

📋 What You'll Learn

Create an array called quantities with the exact values: 3, 5, 2, 8, 6

Create a variable called total and set it to 0

Use a for loop with a variable i starting at 0, running while i is less than the length of quantities, and incrementing i by 1 each time

Inside the loop, add $quantities[$i] to $total

Print the value of $total

💡 Why This Matters

🌍 Real World

Counting items in stock is a common task in shops and warehouses to keep track of inventory.

💼 Career

Understanding loops and arrays is essential for programming tasks like data processing, reporting, and automation.

1

Create the quantities array

Create an array called quantities with these exact values: 3, 5, 2, 8, 6.

PHP

<?php

// Create the array called quantities with values 3, 5, 2, 8, 6
// Your code here

Need a hint?

Use square brackets [] to create an array in PHP.

2

Create the total variable

Create a variable called total and set it to 0.

PHP

<?php

$quantities = [3, 5, 2, 8, 6];

// Create a variable called total and set it to 0
// Your code here

Need a hint?

Use $total = 0; to create and set the variable.

3

Add a for loop to sum quantities

Use a for loop with variable i starting at 0, running while i is less than count($quantities), and incrementing i by 1 each time. Inside the loop, add $quantities[$i] to $total.

PHP

<?php

$quantities = [3, 5, 2, 8, 6];

$total = 0;

// Add a for loop to sum all quantities into total
// Your code here

Need a hint?

Use count($quantities) to get the number of items in the array.

4

Print the total

Print the value of $total using echo.

PHP

<?php

$quantities = [3, 5, 2, 8, 6];

$total = 0;

for ($i = 0; $i < count($quantities); $i++) {
    $total += $quantities[$i];
}

// Print the total
// Your code here

Need a hint?

Use echo $total; to display the total sum.