Students:  Please note instructions in paper copy of quiz.  Save your
files often, make sure OMSI fills your entire screen at all times, etc.

A question may not fully fit into your OMSI question box, which is not
scrollable.  You can try adjusting the relative size of the question and
answer boxes, but remember that clicking CopyQtoA will copy the entire
question box to the answer box.

QUESTION

What is the number of this course?  (E.g. ECS 123.)

QUESTION -ext .R -run 'Rscript omsi_answer2.R'

Write a function f() that prints its argument minus 1.  Fill in the blanks:

f <- function( ) {

}

print(f(5))  # prints 4