twoSum.java

// Question:  Find the doublet in the Array whose sum is equal to the given value x. (Two Sum) 
//            ( if the Array is {5, 2, 7, -1} and x = 9 then the doublet is [2 and 7] )
package arrays;
import java.util.Scanner;
public class twoSum {
    public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
        System.out.print("Enter the size of array: ");
        int n = sc.nextInt();
        int [] arr= new int[n];
        System.out.print("Enter the elements of the array: ");
        for(int i=0; i<n; i++){
            arr[i]=sc.nextInt();
        }
        System.out.print("Your array is: ");
        for(int ele : arr){
            System.out.print(ele+" ");
        }
    System.out.println();
    System.out.print("Enter a integer(x): ");
    int x=sc.nextInt();
    System.out.println("The duplets whose sum is equal to the given integer are: ");
    for(int i=0; i<n; i++){
        for(int j=i+1; j<n; j++){
            if(arr[i]+arr[j]==x){System.out.println(arr[i]+" , "+arr[j]);}
        }
    }

                       
    }
}