In what scenarios would using the round function in PHP be appropriate for formatting numbers?

Using the round function in PHP is appropriate for formatting numbers when you want to round a floating-point number to a specified precision. This can be useful when working with financial calculations, displaying decimal values in a user-friendly format, or when you need to compare floating-point numbers for equality within a certain margin of error.

$number = 123.456789;
$roundedNumber = round($number, 2);
echo $roundedNumber; // Output: 123.46