Logical

AND

Symbol: &
Translated to JavaScript logical AND operator (&&)
It takes 2+ parameters.

& true false

& true false false

OR

Symbol: |
Translated to JavaScript logical OR operator (||)
It takes 2+ parameters.

| true false

| true false false

NOT

Symbol: !
Translated to JavaScript logical NOT operator (!)
It takes 1 parameter.

! true

! false

! a

Can be written simpler as:

!a