Question

How to get the row of Pascal triangle given an integer rowIndex in VB.NET

Answer 1

Imports System
Imports System.Collections.Generic

Class PascalTriangleRow
    Public Shared Function GetPascalTriangleRow(ByVal rowIndex As Integer) As List(Of Integer)
        Dim row As List(Of Integer) = New List(Of Integer)()
        row.Add(1)

        For i As Integer = 1 To rowIndex
            Dim prev As Integer = row(i - 1)
            Dim value As Integer = CInt((prev * (rowIndex - i + 1) / i))
            row.Add(value)
        Next

        Return row
    End Function

    Public Shared Sub Main()
        Dim rowIndex As Integer = 4
        Dim row As List(Of Integer) = GetPascalTriangleRow(rowIndex)

        For Each num As Integer In row
            Console.Write(num & " ")
        Next
    End Sub
End Class

 
 
' run:
' 
' 1 4 6 4 1 
'

 

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