how long does the president of the USA serve?
Term of office
In the United States, the president of the United States is elected indirectly through the United States Electoral College to a four-year term, with a term limit of two terms (totaling eight years) or a maximum of ten years if the president acted as president for two years or less in a term where another was elected as president, imposed by the Twenty-second Amendment to the United States Constitution, ratified in 1951.
President of South Africa
Although the presidency is the key institution, it is hedged about with numerous checks and balances that prevent its total dominance over the government, as was the case in many African countries. The presidential term is five years, with a limit of two terms. Thus the electoral system attempts (at least on paper) to prevent the accumulation of power in the president as was during Apartheid or in many other African countries.[8]