Is it possbile to have a null value on Example table on Cucumber Scenario Outline?

Here is my example table on my scenario outline, some does not have value, is this possible?

Examples:

|ID   | UserName   | Password  | Contact1 | Number       |

|ID1  | username1  | password1 | Phone    | 111 222 4444 |

|ID2  | username2  | password2 |          |              |

|ID3  | username3  | password3 | Email    | a@a.com      |

|ID4  | username4  | password4 |          |              |