How to indicate a blank space in Column Validation?

Question

I have a column called Machine #. There is a space between Machine and the # symbol. I think the space might be causing an issue - Sharepoint does not seem to like having a space in the Column Validation section.

How to I type Machine # in such a way that Sharepoint will accept me using a column with a space in the column name? For instance I've tried Machine%20#.

Answer 1

There is a workaround which achieves the result I need. Gopal Zadafiya provided this tidy trick:

• Create the column with only name "Machine" and save. Then change the display name to "Machine #" afterwards. Validation will work after changing the display name too.

Therefore, the Column Validation is simple and =LEN([Machine #])=6 is accepted by Sharepoint.