What is the output of the following program segment? Dim numbers(4) As Double Di

Question

What is the output of the following program segment?

Dim numbers(4) As Double

Dim sr As IO.StreamReader = IO.File.OpenText("DATA.TXT")

For i As Integer = 0 To 4

numbers(i) = CDbl(sr.ReadLine)

Next

sr.Close()

For k As Integer = 0 To 2

numbers(k + 1) += numbers(k)

Next

txtBox.Text = CStr(numbers(3))

Explanation / Answer

We start with the values.>> 3, 6, 4, 8, 3 in the numbers array. The 1st 3 being at position zero . So after k = 0 in the loop.>> For k As Integer = 0 To 2 numbers(k + 1) += numbers(k) Next we have numbers ( 0 + 1 ) += numbers(0) which turns the 6 to 9 as it adds numbers(1) to numbers(0) putting the result back into numbers(1) where the 6 is originally due to the += operation. It adds the 3 + 6 = 9 After k = 1 we have numbers ( 1 + 1 ) += numbers(1) which turns the 4 to 13 as it adds numbers(2) to numbers(1) putting the result back into numbers(2) where the 4 is originally due to the += operation. It adds the 9 (from the previous step) + 4 = 13 After k = 2 we have numbers ( 2 + 1 ) += numbers(2) which turns the 8 to 21 as it adds numbers(3) to numbers(2) putting the result back into numbers(2) where the 8 is originally due to the += operation. It adds the 13 (from the previous step) + 8 = 21 so b=21

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