The constitution is a written document containing 395 articles and schedules,therefore, fulfils the basic requirements of a federal government.
The Indian const. is most elaborate const. in the world.
The Indian const. is both rigid and flexible.
It is a federal constitution.
It provide parliamentary form of government both at the centre and in the state.
This const. guarantees fundamental rights of citizen.
Our const. also provide a number of directive principles.

so,i hope this will help you........ 
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Fundamental rights are the special features of indian constitution