Is it completely equivalent use of "class" or "typename" in the template definition?

Question

It is not clear if the two keywords are equivalent or if there is any difference.
template <class T>
template <typename T>

Why in SoloLearn it is used the keyword "class"?

Answer 1

Thanks aklex.

Answer 2

https://stackoverflow.com/questions/2023977/difference-of-keywords-typename-and-class-in-templates