Put a single quote (apostrophe) at the beginning of the line. So if you sent to an Excel cell
1234, Excel would interpret this as a number and give the cell General formatting. General formatting will interpret this as an integer.
'1234, Excel will see this as a string.
You can tell if you have it right by the cell justification. If the cell has not been previously changed, that is, default formatting, text will justify to the left of the cell automatically, numbers on the right.
