Question

How to check if an array contains a pair of numbers whose product is odd in PHP

Answer 1

// A product of a pair of integers will always be odd if at least 2 of them are odd

function arrayContainsAPairOfOddProduct($arr) {
    $oddCount = 0;

    foreach ($arr as $num) {
        if ($num % 2 != 0) {
            $oddCount++;
            if ($oddCount == 2) {
                break;
            }
        }
    }

    return $oddCount > 1;
}

$arr = [2, 2, 4, 4, 6, 6, 7, 10, 10, 9];

echo arrayContainsAPairOfOddProduct($arr) ? "true" : "false";



/*
run:

true

*/

 

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