Answer & Explanation:
//written in java
import java.util.Arrays;
class Main {
//this function find the greatest product of 3
//integers within any array and return that product
private static int greatestProduct(int[] arr, int length) {
// if the size of array is less that 3
//the method return a value of 0
if (length < 3) {
return 0;
}
// the code below sort the array in ascending order
//multiply the last three, which is the product of the 3
//greatest value in the array
Arrays.sort(arr);
return arr[length - 1] * arr[length - 2] * arr[length - 3];
}
// the main method
public static void main(String[] args) {
int[] arr = {5, 3, 4, 2, 8, 10, 1};
int n = arr.length;
int product = greatestProduct(arr, n);
//if the size of array is less than 3
//greatestProduct(arr, n) return zero
//and the program print out
//"Size of array is less than three so product of 3 integers within that array does not exist"
//else it print the product of the three largest integer in the array
if (product == 0)
System.out.println("Size of array is less than three\\so product of 3 integers within that array does not exist");
else
System.out.println("Maximum product is " + product);
}
}