Sum of the Border elements of 2D Array - java
04-12-2018    57 times
Border elements 2D Array

create a double dimension array of size m x n, where m and n are input by the user and calculate the sum of the border elements.

Border elements of an array are placed at the border of the array. Which are satisfy some conditions (i)if row no = 0 or (total row -1) (ii) column no = 0 or (total col -1). Therefore, we just travel the array once and add all the elements which meet the above conditions.

Tutorial at home
import java.util.*;
public class Border2D
{
    public static void main(String []args)
    {
        Scanner sc=new Scanner(System.in);
        int s=0,m,n;
        System.out.print("Enter the Row No :");
        m=sc.nextInt();
        System.out.print("Enter the Col No :");
        n=sc.nextInt();
        
        int [][]arr=new int[m][n];
        
        for(int r=0;r<m;r++)
        {
            for(int c=0;c<n;c++)
            {
                arr[r][c]=sc.nextInt();
                
            }
        }
        for(int r=0;r<m;r++)
        {
            for(int c=0;c<n;c++)
            {
                if((r==0) || (r==(m-1)) || (c==0) || (c==(n-1)))  
                {
                    s+=arr[r][c];
                }
            }
        }
        System.out.println("Sum Is : " + s);
    }
}
Tutorial at home
softetechnologies
    Author Details
Arnab De
I have over 16 years of experience working as an IT professional, ranging from teaching at my own institute to being a computer faculty at different leading institute across Kolkata. I also work as a web developer and designer, having worked for renowned companies and brand. Through tutorialathome, I wish to share my years of knowledge with the readers.
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