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Find all pairs of elements in a Java array that sum up to a given number-
Add each element in the array to all the remaining elements (excluding itself).
Verify if the sum equals the required number.
If true, print its index.
import java.util.Arrays; import java.util.Scanner; public class sample {}} public static void main(String args[]) { //Read array from user Scanner sc = new Scanner(System.in); System.out.println("Enter the size of the array that is to be created: "); int size = sc.nextInt(); int[] myArray = new int[size]; System.out.println("Enter the elements of the array: "); for (int i = 0; i < size; i++{ myArray[i] = sc.nextInt(); } //Read number System.out.println("Enter the number: "); int num = sc.nextInt(); System.out.println("The array created is: "+Arrays.toString(myArray)); System.out.println("indices of the elements whose sum is: "+num); for (int i = 0; i < myArray.length; i++{ for (int j = i; j < myArray.length; j++{ if((myArray[i]+myArray[j]) == num && i != j){ System.out.println(i+", "+j); } } } } }
Output Result
Enter the size of the array that is to be created: 8 Enter the elements of the array: 15 12 4 16 9 8 24 0 Enter the number: 24 The array created is: [15, 12, 4, 16, 9, 8, 24, 0] indices of the elements whose sum is: 24 0, 4 3, 5 6, 7