What does #null mean in Excel?

Related questions

1. What is NPV example?
2. What is net present value in simple terms?
3. How do you calculate the discount rate for NPV?
4. What is NPV used for?
5. Why is NPV calculated?
6. What is NPV in Excel?
7. Is negative NPV bad?
8. What is Nper in Excel?
9. What is the discount rate for NPV?
10. What is the difference between NPV and XNPV?

Tags

1. #intersect
2. #separated
3. #means
4. #error
5. #character
6. #overlapping
7. #space
8. #occur
9. #intersecting
10. #unintentionally
11. #incorrectly
12. #values
13. #which
14. #formulas
15. #operator
16. #ranges
17. #listing
18. #formula
19. #references
20. #excel