No, it is not mandatory to wear a helmet while driving a car in any country. Helmets are typically associated with motorcycle riding, and the requirement to wear a helmet varies from country to country. Laws regarding helmet use for motorcyclists vary significantly worldwide.
Many countries have laws that require motorcyclists to wear helmets for safety reasons. The specific requirements, such as the type of helmet and age restrictions, can vary. Some countries have strict laws that mandate helmet use for all motorcyclists, while others have more relaxed regulations, such as requiring helmets only for specific age groups or under certain conditions.
It is important to note that the laws and regulations can change over time, so it's always best to consult the current legislation in the specific country or region where you plan to drive a motorcycle to ensure compliance with the applicable helmet laws.