Question

How to check if an array contains a pair of numbers whose product is even in Java

Answer 1

// A product of a pair of integers will always be even if at least 1 of them are even

class Program {
    public static boolean arrayContainsAPairOfEvenProduct(int[] arr) {
        int oddCount = 0;
 
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] % 2 == 0) {
                return true;
            }
        }
         
        return false;
    }
     
    public static void main(String[] args) {
        int arr[] = new int[] {1, 1, 3, 3, 5, 5, 8, 9, 9, 11}; // 8 * ? = Even
         
        System.out.println(arrayContainsAPairOfEvenProduct(arr));
    }
}
 
 
 
/*
run:
 
true
 
*/

 

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