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PHP

PHP foreach

$numbers = array(1,2,3,4); $total = count($numbers); $sum = 0; $loop = 0;

foreach($numbers as $number) { $loop = $loop + 1; if ($loop < $total) { $sum = $sum + $number; } }

echo $sum;

I just took the quiz right here, I think the result should be 10, but why the result is 6?

Hope someone can tell me the detail, thank you so much!

Justin Barrett
Justin Barrett
27,243 Points

in your pass: //first pass, loop = 1, if(1 < 4){sum = 0 + 1}, sum = 1 //second pass loop = 2, if(2 < 4) {sum = 2+2;}, sum = 3 //third pass loop = 3, if(3 < 4), {sum = 3+3;}, sum = 6 //fourth pass loop = 4, if(4 < 4), false, sum still equals 6

if you were to change to if ($loop <= $total), then the fourth pass would be true and your sum would equal 10.

//revised fourth pass loop = 4, if(4 <= 4), {sum = 6+4;}, sum = 10

Thank you for your help. So, what if there is no $loop variable at here, then there is only one value will pass to the $sum variable?