Changing the sign of a number in PHP?

Question

I have a few floats:

-4.50
+6.25
-8.00
-1.75

How can I change all these to negative floats so they become:

-4.50
-6.25
-8.00
-1         


        

Answer 1

function positive_number($number)
{
    if ($number < 0) {
        $number *= -1;
    }

   return $number;
}