Vb.net code for a checking a number whether it is prime or not is very simple just write following code on any event on which you want to check the number.For better understanding of these type of vb.net code or database related inquiry the book written by Mike Murach is very good book which is available on amazon with free shipping charge, I will suggest one can be refer
- First design a form where you can enter the number which you want to check. take following control on the form.
Textbox1.text Text property ""
Command button Text property "Check", name property "BtnCheck"
2. Second Step: Write following code on click event of BtnCheck.
Private Sub BtnCheck_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnCheck.Click
Dim i, j As Integer
Dim t As Boolean
i = TextBox1.Text
t = True
For j = 2 To (i - 1)
If i Mod j = 0 Then
t = False
If t Then
MsgBox(i & " is a prime Number")
MsgBox(i & " is not a prime Number")