$name = "John"; $age = 25; printf("My name is %s and I am %d years old.", $name, $age);
$name = "Jane"; $balance = 200.50; $display = sprintf("Hello %s, your current balance is $%.2f.", $name, $balance); echo $display;
$num = 1234567.89; $formatted_num = number_format($num, 2, ",", "."); echo $formatted_num;Output: 1,234,567.89 Package library: Standard PHP library (SPL)