Question

How to check if a sequence of numbers is a Geometric progression (consecutive ratios are the same) in Java

Answer 1

public class SequenceIsGeometricProgression_Java {
    public static boolean isGeometricProgression(int[] arr) {
        int size = arr.length;
        
        if (size == 1) {
            return true;
        }

        int ratio = arr[1] / (arr[0]);

        for (int i = 1; i < size; i++) {
            if ((arr[i] / (arr[i - 1])) != ratio) {
                return false;
            }
        }

        return true;
    }

    public static void main(String[] args) {
        int[] arr = {9, 27, 81, 243, 729, 2187};
        

        System.out.println(isGeometricProgression(arr) ? "Yes" : "No");
    }
}


/*
run:

Yes

*/

 

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