Indian mathematics has its roots in Vedic literature. It is imperative to know about the ancient, medieval and modern time Indian mathematicians and their contribution in the field of Mathematics. Indian mathematicians made significant early contributions to the study of the concept of zero as a number, negative numbers, arithmetic, and algebra. In addition, trigonometry was further advanced in India, and, in particular, the modern definitions of sine and cosine were developed here. Ancient Indian mathematicians have contributed immensely to the field of mathematics. The invention of zero is attributed to Indians and this contribution outweighs all other made by any other nation since it is the basis of the decimal number system, without which no advancement in mathematics would have been possible. The number system used today was invented by Indians and it is still called Indo-Arabic numerals because Indians invented them and the Arab merchants took them to the western world. It is also noticed that there is a distinct and inequitable neglect off the contributions of the sub-continent. Many of the developments of Indian mathematics remain almost completely ignored, or worse or attributed to the scholars of other nationalities, often European. However a few historians (mainly European) are reluctant to acknowledge the contributions of Indian mathematicians. They believe Indians borrowed the knowledge of mathematics from Greeks. Even after all those criticisms it is a great pleasure for us to have been born in such a country where so many great mathematicians like Aryabhata, Brahmagupta, Srinivasa Ramanujan, P.C. Mahalanobis , Calyampudi Radhakrishna Rao, D.R. Kaprekar, Satyendra Bose ,Bhaskara I, Mahavira, Bhaskara II and many others born.