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PHP

Paul Yorde
Paul Yorde
10,497 Points
Posted by Paul Yorde
Paul Yorde
10,497 Points

functions code challenge

How is this generating 6?

    <?php

$numbers = array(1,2,3,4);

$total = count($numbers);

$sum = 0;

$output = "";

$i = 0;

foreach($numbers as $number) {

$i = $i + 1;

if ($i < $total) {

    $sum = $sum + $number;

}

}

echo $sum;

?>

1 Answer

Mike Costa
PLUS
Mike Costa
Courses Plus Student 26,362 Points
Mike Costa
Mike Costa
Courses Plus Student 26,362 Points

Hey Paul,

You're getting a sum of 6 because your $total variable is equal to 4, as there are 4 values in your $numbers array. In your if statement, when $i = 3, 3 is less than 4, so the first 3 values of $numbers gets added together, 1 + 2 + 3 = 6. If you want the last value accounted for, you can use

if($i <= $total) { $sum = $sum + $number; }

Hope that helps!

Paul Yorde
Paul Yorde
10,497 Points
Paul Yorde
Paul Yorde
10,497 Points

I see. Each of the $numbers array gets put into the working variable $numbers. On the first iteration, $number + $sum = 1. On the second iteration, $sum = 3, and the final iteration is 6 (while 3 < 4).