##-
# Author: Brian Tiffin
# Dedicated to the public domain
#
# Date: August 2016
# Modified: 2016-10-03/22:36-0400
##+
#
# acos.icn, demonstrate the the arc cosine function
#
procedure main()
    write("Arc Cosine: Domain -1 <= x <= 1; result in radians")
    every r := -1.0 to 1.0 by 0.25 do {
        write(left("acos(" || trim(left(r, 6)) || ")", 12),
              " = ", acos(r))
    }
end