The constitution is a set of fundamental rules that determines how a country Or state is run. Every state has a constitution of its own,like every game having some rules of it's own. Every state must have a constitution, Since every state function on the basis of certain rules and principles. They are written down clearly in specific document called "the constitution"

Indian Constitution
India also known as Bharat is a union of state. WE, THE PEOPLE OF INDIA, having solemnly resolved to constitute India into a SOVEREIGN, SOCIALIST, SECULAR DEMOCRATIC republic with a parliamentary system of government.

The Republic is governed in terms of the constitution of India which was adopted by the constituent assembly on 26 November,1949 and came into force on 26 January, 1950.

The Indian constitution is the world largest for a sovereign nation. It had 395 Article in 22 parts and 8 schedule. At about 145,000 words. The amended constitution has a preamble and 470 article, which are grouped into 25 parts with 12 schedule and five appendices, it has been amended 105 times.

Conclusion
The constitution of our India is considered to be the best constitution in the world. It has been made after studying the constitution around the world. Everyone has the same right and duties. No one is rich nor poor in his eyes. There is a law of equal reward and punishment for all.

"so long as you do not achieve social liberty, whatever freedom is provided by the law is of no avail to you" -- B.R.Abedekar.