Magento 2 : Write Custom Log

$writer = new \Zend\Log\Writer\Stream(BP . '/var/log/your.log');
$logger = new \Zend\Log\Logger();
$logger->addWriter($writer);
$logger->info('Your text message');
$logger->info(print_r($yourArray, true));
$logger->info(json_decode(json_encode($NewYorkCity),true));