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Ruby program to calculate the sum of columns of matrix elements

Last Updated : December 15, 2025

Problem Solution

In this program, we will create a matrix using the 2D array. Then we read elements of the matrix from the user. After that, we will calculate the sum of columns of matrix elements and print the result.

Program/Source Code

The source code to calculate the sum of columns of matrix elements is given below. The given program is compiled and executed successfully.

# Ruby program to calculate the sum of columns 
# of matrix elements

TwoDArr = Array.new(2){Array.new(2)}
sum = 0;

printf "Enter elements of MATRIX:\n";
i = 0;
while (i < 2) 
  j = 0;
  while (j < 2) 
    printf "ELEMENT [%d][%d]: ", i, j;
    TwoDArr[i][j] =  gets.chomp.to_i;
    j = j + 1;
  end
  i = i + 1;
end

printf "MATRIX:\n";
i = 0;
while (i < 2)
  j = 0;
  while (j < 2) 
    print TwoDArr[i][j]," ";
    j = j + 1;
  end
  i = i + 1;
  print "\n";
end

i=0;
j=0;
while (i < 2) 
  j = 0;
  sum = 0;
  while (j < 2) 
    sum = sum + TwoDArr[j][i];
    j = j + 1;
  end
  printf "Sum of column(%d): %d\n", i, sum;
  i = i + 1;
end

Output

Enter elements of MATRIX:
ELEMENT [0][0]: 1
ELEMENT [0][1]: 2
ELEMENT [1][0]: 3
ELEMENT [1][1]: 4
MATRIX:
1 2 
Sum of column(0): 4
Sum of column(1): 6

Explanation

In the above program, we created a 2X2 matrix TwoDArr using the 2D array. Then we read the elements of the matrix. After that, we calculated the sum of columns of matrix elements and printed the result.

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