IF statements within Excel VBA

In the below example please could you explain why I need to declare the variable as 3 if the following statement works without having 3 in the cell range (ie I have left it blank yet still returns yes,no).

My understanding was that this will only perform if x=3

Sub ifthen()
Dim x As Integer

x = 3

If x = 3 Then
Cells(1, 1).Value = "Yes"
Cells(1, 2).Value = "Please"

End If

Thankyou