Why do some countries have both president and prime minister?

>>81618459 (OP)
President's have executive powers

PMs have legislative powers

Sometimes PMs just do the bidding of the president while other times, the president is literally just a figurehead who does ceremonial duties

>>81618459 (OP)
Because you're ghey

>>81618459 (OP)
President is the head of state, equivalent to the king. Generally he's mostly a figurehead.

Prime Minister is the head of government. He is the executive, and does the actual decision-making.

America is an anomaly, because their President also takes the role of Prime Minister, and is both the head of state and head of government, similar to how it is in absolute monarchies where the king runs the show (note that most absolute monarchies do have deliberative assemblies, before you squeal about congress & the senate)

>>81618459 (OP)
Because the president is usually a democratic stand-in for a monarch, while the PM is the head of government.