India is the sovereign power with a government ofparliamentary system , socialist secular , democratic republic. This Republic is governed by theConstitution of India. Constitution of India was passed by the Constituent Assembly on November 26, 1949 and effective from 26 January 1950.

Dr. Babasaheb Ambedkar , President of the IndianConstitution Commitee, handed over the Constitution of India to the President of the Constituent Assembly on November 26, 1949 and to the President Dr. Rajendra Prasad. Therefore, this day (November 26) has been declared as the Constitution Day of India, while the day of 26 January is celebrated in India as the Republic of India.

Brief Introduction=====================================Preamble of Constitution of India before 42th AmendmentThe Constitution of India is the longest written constitution of any democratic country in the world. It now has 465 paragraphs, and 12 schedules and it is divided into 22 parts. But at the time of its creation, 395 paragraphs in the original constitution, which were divided into 22 parts, had only 8 schedules. In the constitution, the parliamentary form of government has been arranged, whose structure is federal in addition to some exceptions. The constitutional chief of the Central Executive is the President. According to Section 79 of the Constitution of India, there is a President and two houses in the Council of the Central Parliament, which is known as Rajya Sabha and the House of Lok Sabha, the Council of States. This provision has been made in Section 74 (1) of the Constitution that there will be a Council of Ministers to assist and advise the President, whose head will be the Prime Minister, the President will perform his functions according to the advice of this Council of Ministers. Thus, the actual executive power is contained in the Council of Ministers, whose prime minister is the Prime Minister, who is presently Narendra Modi.