This document provides an overview of the basic features of the Constitution of India. It begins by defining what a constitution is and explaining why constitutions are needed. It then discusses the history of India's constitution, including the Government of India Act of 1935 and the Indian Independence Act of 1947. The key events in the framing of India's constitution between 1946 and 1950 are summarized. Finally, the document outlines some of the salient features of the Indian constitution, including that it is the longest in the world, its preamble, fundamental rights, and definition as a sovereign, socialist, secular, democratic republic.