How to find the sum of each row and each column of a matrix (2D array) in VB.NET

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Imports System
                 
Public Module Module1
    Public Sub Main()
        Dim arr(,) = New Integer(,) {
                        {1, 2, 3, 5},  
                        {4, 5, 6, 5},  
                        {7, 8, 9, 5}  
                    } 
              
        Dim rows As Integer = arr.GetLength(0) 
        Dim cols As Integer = arr.GetLength(1)  
		Dim sumRow As Integer
		Dim sumCols As Integer
		
		For i As Integer = 0 To rows - 1
			sumRow = 0
            For j As Integer = 0 To cols - 1
				sumRow = sumRow + arr(i, j)  
        	Next
			Console.WriteLine("Sum of row: {0} = {1}", i,  sumRow)
		Next
		For i As Integer = 0 To cols - 1
			sumCols = 0
            For j As Integer = 0 To rows - 1
				sumCols = sumCols + arr(j, i)  
        	Next
			Console.WriteLine("Sum of row: {0} = {1}", i,  sumCols)
		Next
    End Sub
End Module
 
 
 
 
' run
'
' Sum of row: 0 = 11
' Sum of row: 1 = 20
' Sum of row: 2 = 29
' Sum of row: 0 = 12
' Sum of row: 1 = 15
' Sum of row: 2 = 18
' Sum of row: 3 = 15
'

 



answered Feb 20, 2021 by avibootz
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