The right to vote is not a Fundamental Right as such but is a Constitutional right and responsibility as provided under Article 326 of the Indian Constitution which says that any person who is not below 18 years of age and is not disqualified otherwise will be entitled (entitled) to be registered as a voter. The Article begins with the sentence 'The elections to the House of the People and to the Legislative Assembly of every State shall be on the basis of adult suffrage'. Suffrage means the right to vote in elections.
Again, Section 62 of the Representation of the People Act, 1951, also says that any person who is not disqualified otherwise by the Constitution or by any other law in force shall be entitled to vote in an election to elect their representatives.
In addition to this, there have been various rulings by different Courts including the Supreme Court that has time and again upheld the right of the 'People' of India to choose their representatives by casting their votes.
So, a reading of all these provisions together and also keeping in mind the words 'We, the people of India' with which our Constitution begins in mind, it is, no doubt, our right to vote and no one can take away this right unless one is otherwise disqualified as per law in force.
'Real knowledge is to know the extent of one's ignorance' - Confucious.