Why we not get any certificate after completion of the c language

Question

I didn't get certificate after completing my the c language course.

Answer 1

C is not a course in itself, it is a set of lessons created by members of the community, so at the end no certificate is given.

Answer 2

If the language has interactive questions, it's one of the original 12 languages you can get a certificate for. If it doesn't it's a more recently added lesson.