What is Loop? How apply loop in VB?

VB loop structures definition as Microsoft Developer Network:

The technique that allow you to run one or more lines of code repetitively. You can repeat the statements in a loop structure until a condition is True, until a condition is False, a specified number of times, or once for each element in a collection.

To learn more about VB loop structures, just follow this link:

https://msdn.microsoft.com/en-us/library/ezk76t25.aspx

My own example about loop:

This is the code if you want to test it:

Sub Loop_Example()

Do Until IsEmpty(ActiveCell)

If ActiveCell.Value = 2 Then

ActiveCell.Interior.Color = vbGreen
ActiveCell.Offset(1, 0).Range("A1").Select

Else
'Step down to the next row
ActiveCell.Offset(1, 0).Range("A1").Select

End If

Loop

End Sub