How can adding comments to the code improve its readability and maintainability?

Adding comments to the code can improve its readability and maintainability by providing explanations for complex logic, indicating the purpose of certain sections of code, and documenting any assumptions or constraints. This helps other developers understand the code more easily and make changes without breaking existing functionality. Additionally, comments can serve as a reference point for future maintenance and troubleshooting. 

// Calculate the total price of items in the cart
$totalPrice = 0;
foreach ($cartItems as $item) {
    // Calculate the subtotal for each item
    $subtotal = $item['price'] * $item['quantity'];
    
    // Add the subtotal to the total price
    $totalPrice += $subtotal;
}

echo "Total Price: $totalPrice";

Keywords

comments readability maintainability code PHP

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