What are some best practices for calculating costs in a while loop in PHP, especially when costs increase by a certain percentage?

When calculating costs in a while loop in PHP, especially when costs increase by a certain percentage, it's important to keep track of the current cost and apply the percentage increase in each iteration. This can be achieved by multiplying the current cost by (1 + percentage increase) to get the updated cost for the next iteration. 

$initialCost = 100;
$percentageIncrease = 0.05; // 5% increase
$iterations = 5;
$currentCost = $initialCost;

while ($iterations > 0) {
    $currentCost = $currentCost * (1 + $percentageIncrease);
    $iterations--;
}

echo "Final cost after 5 iterations: $" . number_format($currentCost, 2);

Keywords

while loop PHP cost calculation percentage increase precision arithmetic

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