Getting average of all even numbers in array with for/while loop?

Question

I have a array and i need to get the average of all the EVEN numbers in the array i already have tried this but it still doesn't work.

$aReeks = array(23,245,1,2,12,-10,46,6,66,9999,-55,348,56,6,66,983); 
for ($q = 0; $q < count($aReeks); $q++)
      {
          { 
            if ($aReeks[$q] % 2 == 0)
            $totaaleven = array_sum($aReeks[$q]) / count($aReeks[$q]);
          }
      }
echo $totaaleven

What's with the weird inner block? also, you need a ; after echo $totaleven — Tyler Sebastian
– Tyler Sebastian, Commented May 13, 2016 at 18:12
Can't you figure it out from the answers given to all your previous questions this afternoon? Like stackoverflow.com/questions/37212309/… and stackoverflow.com/questions/37210893/… — Mark Baker
– Mark Baker, Commented May 13, 2016 at 18:15
$totaaleven = array_sum($even = array_filter($aReeks,function($v) {return $v%2==0;}))/count($even); No (explicit) looping required... — Niet the Dark Absol
– Niet the Dark Absol, Commented May 13, 2016 at 18:15
I hope that your teacher appreciates that we're beginning to get fed up with you and the number of your fellow students who have been asking exactly the same questions all afternoon; especially as every question is just a minor variation on the others.... the max value, the average, the sum, etc — Mark Baker
– Mark Baker, Commented May 13, 2016 at 18:18

Chris Forrence · Accepted Answer · 2016-05-13 18:19:52Z

3

I think this should work for you

$aReeks = array(23,245,1,2,12,-10,46,6,66,9999,-55,348,56,6,66,983); 

$evenSum = 0;
$evenCount = 0;

foreach($aReeks as $number) {
    if($number % 2 == 0) {
        $evenSum = $evenSum + $number;
        $evenCount++;
    }
}

$average = $evenSum / $evenCount;

edited May 13, 2016 at 18:19

Chris Forrence

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answered May 13, 2016 at 18:16

Nick Surmanidze

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Comments

kamal pal · Accepted Answer · 2016-05-16 06:43:45Z

2

You can filter your array using array_filter for even number, and simply divide sum with count, see below:

$aReeks = array(23,245,1,2,12,-10,46,6,66,9999,-55,348,56,6,66,983); 
$evenNos = array_filter($aReeks, function($value) {
    return !($value%2);
});
echo array_sum($evenNos)/count($evenNos);

edited May 16, 2016 at 6:43

answered May 13, 2016 at 18:16

kamal pal

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