To tell if a cell is Null use this code. The key being the brackets.
=IF(I2 <>"",I2,"")
MS Excel – Function to Remove Nonprintable Characters
Use this combination of Excel functions to scrub a cell of bad, MS Office and non-printing code
- Substitute and CHAR(10) removes lines breaks
- Clean removes all nonprinting characters
=LEFT(S2, LEN(S2) - 4)
=IF(J3<0,CLEAN(SUBSTITUTE(J3,CHAR(10),", "))," ")