How can I use an elseif statement in PHP? Example code: - Biz Tech

How can I use an elseif statement in PHP? Example code:

Listen 
$age = 30;

if ($age < 18) {
    echo "You are a minor";
} elseif ($age >= 18 && $age < 65) {
    echo "You are an adult";
} else {
    echo "You are a senior citizen";
}

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