because there are some many countries in the world that the president doesn't have to know them all,and plus he is busy running the country and other stuff that presidents do.
South America is a continent. It has lots of countries. There is not a single president for all of those countries. So there is no president of South America.
no
It depends which countries president you are referring to.
See the link below for a full list of all the countries in the world, including sovereign and partially recognized states.
The United Nations
Africa is not a country. It is a continent with over 50 countries. There is no president of Africa. Lots of the individual countries have their own presidents, but there is no president of all of Africa. So Africa does not and never has had a president.
Typically the Holy Land is represented religiously by the Jerusalem Cross. However, if you are referring to politics, all European Countries recognized the State of Israel and some also recognized Palestine.
The United Nations includes almost all the internationally recognized countries in the world. Three countries are not members. Vatican City, Kosovo, and Taiwan are not members.
Other countries are different. Some countries presidents are really dictators with life time terms
There is a list of capitals of both recognized and unrecognized countries at the related link below.
Antarctica has no government, although various countries claim sovereignty in certain territories. Although a few of these countries have mutually recognized each other's claims, the validity of these claims is not recognized universally. Several claims overlap each other.The Antarctic Treaty expressly holds all territorial claims in abeyance and prohibits future land claims.There aren't any. Antarctica has no government, although various countries claim sovereignty in certain regions. Although a few of these countries have mutually recognized each other's claims,the validity of these claims is not recognized universally.There are no countries, cities, or permanent human residents there.
*See the related link below for an updated list of the countries of the world (recognized and unrecognized) and their capitals.