casting - Str Function in VBA for Excel adds a character to the string

Question

I am converting an integer to string using the str() function

However, I noticed that the str() function would return an extra character to the string.

For example, MsgBox(Len(str(1))) would return 2.

What is the extra character being appended?

Answer 1

From Excel 2010 help:

"When numbers are converted to strings, a leading space is always reserved for the sign of number. If number is positive, the returned string contains a leading space and the plus sign is implied."

And sure enough this statement returns True in the debug window:

? left(str(1),1) = " "