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.
America in the 20th Century. The 20th century heralded the beginning of a new era in fitness. President Theodore Roosevelt, perhaps the most physically fit president ever to occupy the Oval Office, used his power and own example to encourage U.S. citizens to be physically active.
Major Contribution: Contracting polio before he became the thirty-second president of the United States, Roosevelt founded two highly successful enterprises whose goal was to conquer polio. Roosevelt regularly visited a spa in Warm Springs, Georgia, starting in 1924, to benefit from the waters.