Question

write a program in java to input element in a 3*4 matrix and display the sum of each column of the matrix

Answer 1

Answer:

Java program to input element in a 3*4 matrix and display the sum of each column of the matrix.

Explanation:

import java.io.*;

class GFG {  

   // Get the size m and n  

static int m = 3;  

static int n = 4;

static void column_sum(int arr[][])  

{  

 

// Function to calculate sum of each column     }  

 

       / int i,j,sum = 0;  

 

   System.out.print( "\n Sum of each column:\n\n");  

 

   // finding the column sum  

   for (i = 0; i < 3; ++i) {  

       for (j = 0; j < 4; ++j) {  

 

           // Add the element  

           sum = sum + arr[j][i];  

       }  

 

       // Print the column sum  

       System.out.println(  

            "Sum of the column "

           + i + " = " + sum);  

 

       // Reset the sum  

       sum = 0;  

   }  

}    

   public static void main (String[] args) {  

           int i,j;  

   int [][]arr = new int[m][n];  

 

   // Get the matrix elements  

   int x = 1;  

   for (i = 0; i < m; i++)  

       for (j = 0; j < n; j++)  

           arr[i][j] = x++;  

 

   // Get each column sum  

   column_sum(arr);  

   }  

}