The Citizenship Act of 1955 is to provide for the acquisition and termination of Indiart Citizenship.

i) Acquiring citizenship by birth.
ii) Acquiring citizenship by descent.
iii) Acquiring citizenship by Registration.
iv) Acquiring citizenship by Naturalisation.
v) Acquiring citizenship by incorporation of Territory

a) Loyalty to the constitution.
b) Obeys laws
c) Respecting diversity

i) Fundamental Rights.
ii) Right to vote in the election to the Lok Sabha and the state legislature.
iii) Right to hold certain public offices.
iv) Right to become a member of parliament and state legislature.

i) Natural Citizens: They are the citizens by birth
ii) Naturalised citizens: They are the one who acquires citizenship.

The citizenship act of 1955 prescribes five ways of acquiring citizenship. they are by birth, descent, registration, naturalization, and incorporation of territory.
By Birth:
i) A person born in India on or after 26th January 1950 but before 1st July 1987 is a citizen of India by birth irrespective of the nationality of the parents.
ii) A person born in India on or after 1st July 1987 is considered as a citizen of India only is either of his parents is a citizen of India at the time of his birth.
those born in India on or after 3rd December 2004 are considered citizen of India or one of whose parents is a citizen of India and the other is not a migrant at the time of their birth.
By Descent:
i) A person born outside India on or after 26th January 1950 but before 10th December 1992 is a citizen of India by descent if his father was a citizen of India at the time of his birth.
ii) From 3rd December 2004 onwards, a person born outside India shall not be a citizen of India by descent, unless his birth is registered at an Indian consulate within one year of the date of birth.
By Registration:
i) A person of India origin who is ordinarily resident in any country or place outside undivided India.
ii) A person who is married to a citizen of India and is ordinarily resident in India for seven years before making an application for registration.
By Naturalisation: The central government may on an application grant a certificate of Naturalisation to any person.
i) If he is not a citizen of any country where citizens of India are prevented from becoming subjects or citizens of that country.
ii) He has either resided in India or been in the service of a govt in India or throughout the period of twelve months.
iii) He is a good character and has adequate knowledge of a language specified in the eighth schedule to the constitution.
By Incorporation of territory:
If any foreign territory becomes a part of India, the government of India specified the person who among the people of the territory shall be the citizen of India. Such persons become the citizen of India from the notified date.

Renunciation : (a voluntary act)
when a person after acquiring the citizenship of another country gives up his/ her Indian citizenship.
Termination : (by operation of Law)
When an Indian citizen voluntarily acquires the citizenship of another country he/ she automatically ceases to be an Indian citizen. 
Deprivation : (Compulsary Termination)
The citizenship is deprived on the basis of an order of the government of India in case involving acquisition of India citizenship by fraud, false representation or being disloyal to the constitution.

Alien and immigrant are two terms that are used to refers to non-nationals of a country.
Alien: It refers to all non-citizens or non-nationals residing in a country. eg: tourists, foreign students.
Immigrant: It refers to alien who has been granted the rights to reside and work permanently without restriction in a particular country.

i) Global citizenship is an idea that everyone no matter where they live is a part of a worldwide community rather than as the citizen of a particular nation or a place 
ii) All people have rights and civic responsibilities
iii) It is fundamental in enabling young people to access and participate in shaping modern society.

i) Our Indian constitution provides only for single citizenship, that is, the Indian citizenship 
ii) It provides uniform rights for the people of India 
iii) But federal states like USA and Switzerland has dual citizenship.