Indeed it was possible to express architecture by an algorithm [Hersey 1976:24]. Simply by mentioning the style a numerical formula was implied and the dimensions of the order could be constructed. These two design procedures are both clearly governed by numerical ratios — series of numbers ...
In Euclid's algorithm, we start with two numbersXandY. If Y is zero then the greatest common divisor of both will be X, but if Y is not zero then we assign theYtoXandYbecomesX%Y. Once again we check if Y is zero, if yes then we have our greatest common divisor or GCD otherwise ...