What are the different types of presidential systems?

There are three main types of presidential systems:

1. Pure Presidential System: In this type, the president is the head of state and government, and holds significant executive powers. The president is elected directly by the people and is not accountable to the legislature. The president appoints and dismisses government officials, and has the authority to veto legislation. Examples of countries with a pure presidential system include the United States and Brazil.

2. Semi-Presidential System: In this type, the president shares executive powers with a prime minister and a cabinet. The president is directly elected by the people and serves as the head of state, while the prime minister is appointed by the president and serves as the head of government. The president usually has significant powers, such as appointing key officials and vetoing legislation, but the prime minister is responsible for day-to-day governance. Examples of countries with a semi-presidential system include France and Russia.

3. Presidential-Parliamentary System: This type combines elements of both presidential and parliamentary systems. The president is directly elected by the people and serves as the head of state, while the prime minister is appointed by the president and serves as the head of government. However, the president's powers are more limited compared to a pure presidential system. The president usually has ceremonial duties and represents the country internationally, while the prime minister holds most executive powers and is accountable to the legislature. Examples of countries with a presidential-parliamentary system include South Korea and Sri Lanka.

It is important to note that the specific powers and functions of the president may vary in each system, as they are often defined by the country's constitution or legal framework.