Not

Computes the logical negation of the input. If x is FALSE, the function returns TRUE. If x is TRUE, the function returns FALSE.

Note  This function performs bit-wise operations on numeric inputs.

The connector pane displays the default data types for this polymorphic function.

x can be a scalar Boolean or number, array or cluster of Boolean values or numbers, array of clusters of Boolean values or numbers, and so on.
.not. x? is the logical negation of x.