1. All governmental activities: take place in the name of the President. All laws and major policy decisions of the government are issued in her name. 

2. Executive power: All major appointments are made in the name of the President. These include the appointment of the Chief Justice of India, the Judges of the Supreme Court and him High Courts of he states, the Governors of the states, the Election commissioners, ambassadors to other countries, etc. All international treaties and agreements are made in the name of the President. The President is the supreme commander of the defense forces of India. 

3. Legislative power: A bill passed by the Parliament becomes a law only after the President gives assent to it. If the President wants, she can delay this for some time and send the bill back to the Parliament for reconsideration. But if the Parliament passes the bill again, she has to sign it. 

4. Discretionary power: When a party or coalition of parties secures a clear majority in the elections, the President, has to appoint the leader of the majority party or the coalition that enjoys majority support in the Lok Sabha. When no party or coalition gets a majority in the Lok Sabha, the President exercises her discretion. The President appoints a Prime Minister who in her opinion can muster majority support in the Lok Sabha. In such a case, the President can ask the newly appointed Prime Minister to prove majority support in the Lok Sabha within a specified time.