The Indian Parliament consists of two houses called as Lok Sabha and the Rajya Sabha respectively and the President of India. Concurrence of all the three is required to pass any legislative business. 
President of India
Main article: President of India
Similar to most Commonwealth countries, India also includes the Head of State (the President of India in India's case) as a component of Parliament. The President of India is elected, from a group of nominees, by the elected members of the Parliament of India (Lok Sabha and Rajya Sabha) as well as of the state legislatures (Vidhan Sabhas), and serves for a term of five years. Historically, ruling party (majority in the Lok Sabha) nominees have been elected and run largely uncontested. Incumbents are permitted to stand for re-election, but unlike the president of the United States, who can be elected just twice, incumbents can be elected for any number of terms. A formula is used to allocate votes so there is a balance between the population of each state and the number of votes assembly members from a state can cast, and to give an equal balance between State Assembly members and National Parliament members. If no candidate receives a majority of votes there is a system by which losing candidates are eliminated from the contest and votes for them transferred to other candidates, until one gains a majority. Pranab Mukherjee is the current President of India. 
Main article: Lok Sabha
Lok Sabha is also known as the "House of the People" or the lower house. All of its members are directly elected by citizens of India on the basis of Universal Adult franchise, except two who are appointed by the President of India. Every citizen of India who is over 18 years of age, irrespective of gender, caste, religion or race, who is otherwise not disqualified, is eligible to vote for the lok sabha. The Constitution provides that the maximum strength of the House be 552 members. It has a term of five years. To be eligible for membership in the Lok Sabha, a person must be a citizen of India and must be 25 years of age or older, mentally sound, should not be bankrupt and should not be criminally convicted. At present, the strength of the house is 545 members. Up to 525 members represent of the territorial constituencies in States, up to 20 members represent the Union Territories and no more than two members from Anglo-Indian community can be nominated by the President of India if he or she feels that the community is not adequately represented. House seats are apportioned among the states by population in such a manner that the ratio between that number and the population of the State is, so far as practicable, the same for all States. Several seats are reserved for representatives of Scheduled Castes and Scheduled Tribes as per...