How to Add a String to the beginning of every value in a range

Hello Excel Forum!

I could use some help on an easy one. My goal is to identify all cells within a column that have values, then add the string "E-" to the beginning of each cell.

I know how to identify the the cells with values within my range and I know that I need to use & to concatenate my string with each cell.

I am not sure how to identify each value within the loop and then how to actually execute the concatenate.

Here is my first attempt:

Public Sub Concatenate Test
Dim invoiceNameRng As Range
Dim invoiceNameValue As Variant

invoiceNameRng = ThisWorkbook.Worksheets("Sheet 1").Range("B2", Range("B2").End(xlDown))

For Each invoiceNameValue In invoiceNameRng
    invoiceNameValue.Value = "E-" & invoiceNameValue
Next

Any help would be greatly appreciated!

-tvxl