What is the difference between using the round function and number_format function in PHP?

The round function in PHP is used to round a number to the nearest integer or a specified number of decimal places. On the other hand, the number_format function is used to format a number with grouped thousands and a specified number of decimal places. The round function simply rounds the number without adding commas or other formatting, while number_format formats the number for display purposes.

// Using the round function
$number = 1234.56789;
$roundedNumber = round($number, 2);
echo $roundedNumber; // Output: 1234.57

// Using the number_format function
$formattedNumber = number_format($number, 2);
echo $formattedNumber; // Output: 1,234.57