We first define the function as a variable, myFirstFun, using the keyword function, which also receives n as argument (no type specification). The latter will exist within the function. We used an integer, but 'n' could also be a vector or a matrix or a string: R handles all this nicely for us.
President Eisenhower responded in June 1956 by holding a White House Conference, which led to the formation of the Presidentâs Council on Youth Fitness and the appointment of a Citizensâ Advisory Committee on the Fitness of American Youth (Nieman 1990).
Some wars were veritable incubators of future presidents: fully one-third of our presidents served in either the Civil War or Second World War. The four men who served in two wars before becoming president are Andrew Jackson, Zachary Taylor, U.S. Grant, and Dwight D. Eisenhower. It will be interesting to see if any future American presidents are veterans of the Persian Gulf War (1991) or the Iraq War (2003-2004). No doubt the president with the most colorful military career was Andrew Jackson. Already as a 13-year-old boy, he was serving in the Continental Army as a messenger.