Visual Basic

They are entering simply a number.for eg., 8 is entered and if degree radio button is checked then it does the below code 

ReadOut.Text = System.Math.Sin(Convert.ToDouble(ReadOut.Text)) * (180 / System.Math.PI)


first it finds the Math.Sin(Convert.ToDouble(ReadOut.Text)) and gets the Sin value for 8 in radians and then it multiplies with (180 / Math.PI) to get the degrees and the new value is converted to string and displayed in the same TextBox. The whole process is done in a single statement

bool doesContain = yourString.Contains(searchString);

Private Sub btn_plusminus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_plusminus.Click

        ReadOut.Text = ReadOut.Text * (-1)

    End Sub

internetuser2k11 wrote:

How to Fix the TextBox so that It shows negative sign before the number

Private Sub btn_plusminus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_plusminus.Click

        ReadOut.Text = ReadOut.Text * (-1)

    End Sub

Private Sub btn_plusminus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_plusminus.Click

        ReadOut.Text = Str(Val(ReadOut.Text) * (-1))

    End Sub