Federalism is a political system where power is divided between the central government and its constituent units or states. In India, federalism is enshrined in the Constitution and is intended to ensure decentralisation of power. The functioning of federalism in India can be summarised as follows:

• India has a federal structure, with power divided between the central government and its constituent states.
• The Constitution sets out the powers of the central and state governments and their respective jurisdictions.
• The central government has the power to make laws on subjects under the Union List, while the state governments make laws on subjects under the State List.
• The concurrent list includes subjects on which both the central and state governments can make laws.
• The Constitution also sets out the procedures for resolving disputes between the central and state governments.
• The states have their own elected governments with well-defined powers and responsibilities, and they also have their own judiciary.
• The central government has the power to declare emergency in times of crisis, which suspends some of the federal provisions and allows the central government to assert more control over the states.
• The federal structure in India is intended to ensure that power is shared among different levels of government, preventing any one authority from becoming too powerful.

Overall, federalism in India ensures that different levels of government work together to achieve the needs of the country while respecting each other's autonomy.