Program to find the Sum of each Row and each Column of a Matrix - GeeksforGeeks

13 May, 2021
Given a matrix of order m×n, the task is to find out the sum of each row and each column of a matrix.
Examples: 
Input: array[4][4] = { {1, 1, 1, 1}, 
                       {2, 2, 2, 2}, 
                       {3, 3, 3, 3}, 
                       {4, 4, 4, 4}};
Output: Sum of the 0 row is = 4
        Sum of the 1 row is = 8
        Sum of the 2 row is = 12
        Sum of the 3 row is = 16
        Sum of the 0 column is = 10
        Sum of the 1 column is = 10
        Sum of the 2 column is = 10
        Sum of the 3 column is = 10
Approach:  
The sum of each row and each column can be calculated by traversing through the matrix and adding up the elements.
Below is the implementation of the above approach:  
C++
Java
Python 3
C#
PHP
Javascript
// C++ program to find the sum// of each row and column of a matrix #include <iostream>using namespace std; // Get the size m and n#define m 4#define n 4 // Function to calculate sum of each rowvoid row_sum(int arr[m][n]){     int i,j,sum = 0;     cout << "\nFinding Sum of each row:\n\n";     // finding the row sum    for (i = 0; i < m; ++i) {        for (j = 0; j < n; ++j) {             // Add the element            sum = sum + arr[i][j];        }         // Print the row sum        cout            << "Sum of the row "            << i << " = " << sum            << endl;         // Reset the sum        sum = 0;    }} // Function to calculate sum of each columnvoid column_sum(int arr[m][n]){     int i,j,sum = 0;     cout << "\nFinding Sum of each column:\n\n";     // finding the column sum    for (i = 0; i < m; ++i) {        for (j = 0; j < n; ++j) {             // Add the element            sum = sum + arr[j][i];        }         // Print the column sum        cout            << "Sum of the column "            << i << " = " << sum            << endl;         // Reset the sum        sum = 0;    }} // Driver codeint main(){     int i,j;    int arr[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 row sum    row_sum(arr);     // Get each column sum    column_sum(arr);     return 0;}
// Java program to find the sum// of each row and column of a matrix import java.io.*; class GFG {     // Get the size m and n    static int m = 4;    static int n = 4;     // Function to calculate sum of each row    static void row_sum(int arr[][])    {         int i, j, sum = 0;         System.out.print("\nFinding Sum of each row:\n\n");         // finding the row sum        for (i = 0; i < m; ++i) {            for (j = 0; j < n; ++j) {                 // Add the element                sum = sum + arr[i][j];            }             // Print the row sum            System.out.println("Sum of the row " + i + " = "                               + sum);             // Reset the sum            sum = 0;        }    }     // Function to calculate sum of each column    static void column_sum(int arr[][])    {         int i, j, sum = 0;         System.out.print(            "\nFinding Sum of each column:\n\n");         // finding the column sum        for (i = 0; i < m; ++i) {            for (j = 0; j < n; ++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;        }    }     // Driver code    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 row sum        row_sum(arr);         // Get each column sum        column_sum(arr);    }}// This code is contributed by inder_verma..
# Python3 program to find the sum# of each row and column of a matrix # import numpy library as np aliasimport numpy as np # Get the size m and nm , n = 4, 4        # Function to calculate sum of each rowdef row_sum(arr) :     sum = 0     print("\nFinding Sum of each row:\n")     # finding the row sum    for i in range(m) :        for j in range(n) :             # Add the element            sum += arr[i][j]         # Print the row sum        print("Sum of the row",i,"=",sum)         # Reset the sum        sum = 0  # Function to calculate sum of each columndef column_sum(arr) :     sum = 0     print("\nFinding Sum of each column:\n")     # finding the column sum    for i in range(m) :        for j in range(n) :             # Add the element            sum += arr[j][i]         # Print the column sum        print("Sum of the column",i,"=",sum)         # Reset the sum        sum = 0           # Driver code    if __name__ == "__main__" :     arr = np.zeros((4, 4))     # Get the matrix elements    x = 1         for i in range(m) :        for j in range(n) :            arr[i][j] = x             x += 1                     # Get each row sum    row_sum(arr)     # Get each column sum    column_sum(arr) # This code is contributed by# ANKITRAI1
// C# program to find the sum// of each row and column of a matrixusing System; class GFG {     // Get the size m and n    static int m = 4;    static int n = 4;     // Function to calculate sum of each row    static void row_sum(int[, ] arr)    {         int i, j, sum = 0;         Console.Write("\nFinding Sum of each row:\n\n");         // finding the row sum        for (i = 0; i < m; ++i) {            for (j = 0; j < n; ++j) {                 // Add the element                sum = sum + arr[i, j];            }             // Print the row sum            Console.WriteLine("Sum of the row " + i + " = "                              + sum);             // Reset the sum            sum = 0;        }    }     // Function to calculate sum    // of each column    static void column_sum(int[, ] arr)    {         int i, j, sum = 0;         Console.Write("\nFinding Sum of each"                      + " column:\n\n");         // finding the column sum        for (i = 0; i < m; ++i) {            for (j = 0; j < n; ++j) {                 // Add the element                sum = sum + arr[j, i];            }             // Print the column sum            Console.WriteLine("Sum of the column " + i                              + " = " + sum);             // Reset the sum            sum = 0;        }    }     // Driver code    public static void Main()    {        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 row sum        row_sum(arr);         // Get each column sum        column_sum(arr);    }} // This code is contributed// by Akanksha Rai(Abby_akku)
<?php// PHP program to find the sum// of each row and column of a matrix // Get the size m and n$m = 4;$n = 4; // Function to calculate sum of each rowfunction row_sum(&$arr){    $sum = 0;     echo "Finding Sum of each row:\n\n";     // finding the row sum    for ($i = 0; $i < m; ++$i)    {        for ($j = 0; $j < n; ++$j)        {             // Add the element            $sum = $sum + $arr[$i][$j];        }         // Print the row sum        echo "Sum of the row " . $i .             " = " . $sum . "\n";                     // Reset the sum        $sum = 0;    }} // Function to calculate sum of each columnfunction column_sum(&$arr){    $sum = 0;     echo "\nFinding Sum of each column:\n\n";     // finding the column sum    for ($i = 0; $i < m; ++$i)    {        for ($j = 0; $j < n; ++$j)        {             // Add the element            $sum = $sum + $arr[$j][$i];        }         // Print the column sum        echo "Sum of the column " . $i .                    " = " . $sum . "\n";                 // Reset the sum        $sum = 0;    }} // Driver code$arr = array_fill(0, $m, array_fill(0, $n, NULL)); // Get the matrix elements$x = 1;for ($i = 0; $i < $m; $i++)    for ($j = 0; $j < $n; $j++)        $arr[$i][$j] = $x++; // Get each row sumrow_sum($arr); // Get each column sumcolumn_sum($arr); // This code is contributed by ita_c?>
<script>// Get the size m and nvar m= 4;var n= 4; // Function to calculate sum of each rowfunction row_sum( arr){     var i,j,sum = 0;     document.write("<br>"+ "\nFinding Sum of each row:"+"<br>");     // finding the row sum    for (i = 0; i < m; ++i) {        for (j = 0; j < n; ++j) {             // Add the element            sum = sum + arr[i][j];        }         // Print the row sum        document.write( "Sum of the row "            + i + " = " + sum            +"<br>");         // Reset the sum        sum = 0;    }} // Function to calculate sum of each columnfunction column_sum(arr){     var i,j,sum = 0;     document.write( "<br>"+"Finding Sum of each column:"+"<br>");     // finding the column sum    for (i = 0; i < m; ++i) {        for (j = 0; j < n; ++j) {             // Add the element            sum = sum + arr[j][i];        }         // Print the column sum        document.write( "Sum of the column "            + i +" = " + sum            +"<br>");         // Reset the sum        sum = 0;    }}      var i,j;    var arr=new Array(m).fill(0);    for(var k=0;k<m;k++)    {        arr[k]=new Array(n).fill(0);    }     // Get the matrix elements    var x = 1;    for (i = 0; i < m; i++)        for (j = 0; j < n; j++)            arr[i][j]=  x++;     // Get each row sum    row_sum(arr);//document.write(arr[0][0]);    // Get each column sum    column_sum(arr);  </script>
Finding Sum of each row:

Sum of the row 0 = 10
Sum of the row 1 = 26
Sum of the row 2 = 42
Sum of the row 3 = 58

Finding Sum of each column:

Sum of the column 0 = 28
Sum of the column 1 = 32
Sum of the column 2 = 36
Sum of the column 3 = 40
 
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