| Associated with null value |
| Associated with "0" |
| Associated with NULL |
| Associated with ナル値 |
| Associated with empty strings |
| Associated with undefined |
| Associated with 0 |
| Associated with empty |
| Associated with Null value |
| Associated with Null Value |
| Associated with nil |
| Associated with null |
| Associated with () |
| Associated with NUL |
| Associated with Null |
| Associated with Empty |
| Associated with ヌル値 |
| Associated with 空文字列 |
| Associated with empty string |
| Associated with false |
| Associated with -1 |
| Associated with Nothing |
| Associated with Nil |
| Associated with nothing |
| Disassociated from 空文字列 |
| Disassociated from empty string |
| Disassociated from empty strings |
| Disassociated from false |
| Disassociated from 0 |
| Disassociated from NULL |
| Disassociated from NUL |
| Disassociated from Null Value |
| Disassociated from Null value |
| Disassociated from ナル値 |
| Disassociated from null value |
| Disassociated from ヌル値 |
| Disassociated from undef |
| Disassociated from undefined |
| Disassociated from Null |
| Disassociated from nil |
| Disassociated from -1 |
| Associated with なし |
| Associated with なし (プログラミング言語) |