click the edit at the bottom of the list to modify the list. Click the black square to calculate the continued fraction as a fraction and as a decimal. you can choose the cutoff rate. Irrationals now work for the square root of 2, 3, and 5, and also 1 is included as 'reset' in constants. http://en.wikipedia.org/wiki/Continued_fraction http://en.wikipedia.org/wiki/Square_root#As_periodic_continued_fractions