An operator that performs a logic operation on nodes, groups, or numbers.
AHDL logical operators are NOT (!), AND (&), NAND (!&), OR (#), NOR (!#), XOR ($), and XNOR (!$).
VHDL logical operators are AND, NAND, OR, NOR, XOR, XNOR, and NOT.
Verilog HDL logical operators are logical and (&&), logical or (||), and logical negation (!).