Article 9 of the Indian Constitution:

Article 9 of the Indian Constitution says that Persons voluntarily acquiring citizenship of a foreign State are not considered indian citizens.

According to Article 9:

No person shall be a citizen of India by virtue of article 5 or be deemed to be a citizen of India by virtue of article 6 or article 8 if he has voluntarily acquired the citizenship of any foreign State.

Article 9 of the Indian Constitution explained:

On the 10th, 11th, and 12th of August 1949, the Senate considered Article 9.

The Indian Constitution, according to article 9, forbids dual citizenship, i.e., possessing Indian citizenship and citizenship of a foreign nation at the same time.

History of Article 9 of the Indian Constitution:

It was first considered as a proviso to Draft Article 5 (Article 5) of the Constitution, rather than as a distinct Article. During the amendment process, the Drafting Committee determined that the prohibition on dual citizenship should be a general concept rather than limited to the circumstances set forth in Article 5.

During the deliberations in the Constituent Assembly, one member advocated for dual citizenship. He said that it should only apply to countries that do the same for Indians. The Assembly, on the other hand, voted down this motion without debate.