Simon Woodhead writes:
Floor and ceiling functions are not available in the current version of Autograph, but will be in a future version. The y = int(x) function is actually a truncation function so int(-3.2) = -3 and int(3.2) = 3. This is not the most useful function, but can be used to define ceiling and floor functions.
Open a 2D graph page and click on Function Definitions. Define:
f(x) = ((int(x) + |int(x)|) + (int(x − 1) − |int(x − 1)|))/2
g (x) = f(x) + 1
Then f(x) is the floor function and g(x) is the ceiling function.