PHP program to demonstrate the use of default arguments

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<?php
//PHP program to demonstrate the 
//use of default arguments.
function Sum($num1, $num2 = 20)
{
    $num3 = $num1 + $num2;
    return $num3;
}

$num3 = Sum(10, 30);
echo "Sum: " . $num3 . "<br>";

$num3 = Sum(10);
echo "Sum: " . $num3 . "<br>";
?>


Output
Sum: 40
Sum: 30
 

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