Prime Number in Visual Basic NET

Here is a sample program that I wrote using Visual Basic NET to ask the user to give a number and then our program will check and determine if the given number is a prime number or not a prime number. Thank you.

My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

Sample Program Output

Program Listing

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim a, b As Integer

        Dim t As Boolean

        a = Val(TextBox1.Text)

        t = True

        For b = 2 To (a - 1)

            If a Mod b = 0 Then

                t = False

                Exit For

            End If

        Next b

        If t Then

            Label2.Text = "The number " & a & " is a PRIME Number."

        Else

            Label2.Text = "The number " & a & " is NOT a PRIME Number."

        End If

    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click

        End

    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

        TextBox1.Text = ""

        Label2.Text = ""

        TextBox1.Focus()

    End Sub

End Class