Pair Sum In Array Java

Question: What is pair Sum ?

Ans:

"Pair sum" ka matlab hota hai ki aapko ek array mein diye gaye kisi bhi do numbers ka sum nikalna hai. Java mein pair sum nikalne ke liye aap ek array mein se do numbers ko select karke unka sum calculate kar sakte hain. Yeh kaam aksar loops (for loop ya while loop) ka istemal karke kiya jata hai.

Ek example ke roop mein, agar aapke paas ek array hai [2, 4, 6, 8, 10] aur aapko 10 ke liye pair sum nikalna hai, to aap is tarah se kar sakte hain:

package aRray;
import java.util.*;
public class pairSum {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		
		int size = scan.nextInt();
		int count =0;
		int targetSum = 10; // yaha jo add krke chahiye wo dalenge
		
		int [] arr = new int[size];  // array of size
		
		for(int i = 0; i < size; i++) {
			arr[i] = scan.nextInt();}
			
			for(int i = 0 ; i < size; i++) {
			for(int j = i+1; j < size; j++) {
				if(arr[i]+arr[j] == targetSum) {
					
					count++;
				}
		}
				}System.out.print(count); 
			
	}
		
	}

Loop ke bahar aake ham count ko print kr rhe

Comments

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Find Unique Number in Array Java , XOR

Question: WAP to find unique number in Array Java package aRray ; import java . util .*; public class practicalArray { public static void main ( String [] args ) { Scanner scan = new Scanner ( System . in ) ; // Step 1: Input size of the array from the user int size = scan . nextInt () ; // Step 2: Create an integer array of the specified size int [] arr = new int [ size ] ; // Step 3: Initialize 'res' with the first element of the array int res = arr [ 0 ] ; // Step 4: Loop to read array elements and find the unique number for ( int i = 1 ; i < size ; i ++ ) { // Read an integer from the user and store it in the array arr [ i ] = scan . nextInt () ; // Step 5: Use XOR (^) operation to find the unique number res = res ^ arr [ i ] ; } // Step 6: Print the unique number System . out . print...

DivBytes

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