The Constitution of India :

The Constitution of India explicitly allows for the re-election of a person to the office of the President. According to Article 57, a person who holds, or who has held, the office of President shall, subject to other provisions of the Constitution, be eligible for re-election to that office [c1][t3][t6]. Unlike the United States, where the 22nd Amendment restricts the President to two terms, the Indian Constitution does not impose any limit on the number of terms a person can serve as President [t8]. While the Draft Constitution initially considered restricting the President to a single term, this was amended during the Constituent Assembly debates to ensure that capable and efficient leaders could be re-elected [t8]. Consequently, there is no constitutional bar on a person seeking re-election multiple times, as confirmed by the text of Article 57 [t4][t7].

Sources

1. [1] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 92: World Constitutions > PRESIDENT AND VICE-PRESIDENT > p. 697