Java Basic Questions
Program to write a product of array except itself

Question

Java Basic Questions
Program to write a product of array except itself

Chris Peck · Accepted Answer

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
 
class GFG {
 
    // Function to remove the element
    public static int[] removeTheElement(int[] arr, int index)
    {
 
        // If the array is empty
        // or the index is not in array range
        // return the original array
        if (arr == null
            || index = arr.length) {
 
            return arr;
        }
 
        // Create ArrayList from the array
        List arrayList = IntStream.of(arr)
                                    .boxed()
                                    .collect(Collectors.toList());
 
        // Remove the specified element
        arrayList.remove(index);
 
        // return the resultant array
        return arrayList.stream()
            .mapToInt(Integer::intValue)
            .toArray();
    }

Googler · Answer

public class productExceptSelf {
    public static void main(String[] args) {
        int a[] = {4, 6, 1, 2};
        prodArray(a, a.length);
    }

    public static void prodArray(int a[], int n) {
        int p[] = new int[n];
        int prod = 1;

        //Find product of all elements of a[]
        for (int i = 0; i < n; i++) {
            prod = prod * a[i];
        }

        //Create array p[] to store
        //product except self
        for (int i = 0; i < n; i++) {
            p[i] = prod / a[i];
        }

        for (int i = 0; i < n; i++) {
            System.out.print(p[i] + " ");
        }
    }
}

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