The conversation between human and AI assistant.
Which are the best websites to learn the C programming language?
Are these websites free to use?
Codecademy offers a free trial period, after which users need to pay for a subscription. Udemy courses are also paid, but they often offer discounts or promotions. edX courses can be audited for free, but if you want to receive a certificate upon completion of the course, you will need to pay a fee.