IIT Bombay offers Free Online Course on Advanced C++ via Swayam and Spoken Tutorial Project ... UG/PG CSE/CS/IT students and anyone who wishes to learning advanced programming can enrol in the course.

Online programming tutorials, such as many online courses, ... Introductions to courses are free, while more-advanced courses require you to subscribe for $6 a month or $50 a year.

An application programming interface, or API, is a "go-between" that enables a software program to interact with other software.