GREATEST COMMON DIVISOR

 

  1. package com.cnc;

    public class Main {

        public static void main(String[] args) {
            System.out.println(getGreatestCommonDivisor(15,12));
        }


        public static int getGreatestCommonDivisor(int first, int second){

            int divisor = 0;

                    if ((first < 10) || (second < 10)){
                        return -1;
                    }

                    if (first > second){
                        for (int i=2; i < first; i++){
                            if ((first % i == 0) && (second % i == 0)){
                                divisor = i;
                            }
                        }
                    }

                    if (first < second){
                        for (int i=2; i < second; i++){
                            if ((first % i == 0) && (second % i == 0)){
                                divisor = i;
                            }
                        }
                    }
                    return divisor;
        }
    }


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