A combinational circuit in computer science is a type of digital logic circuit whose output is determined solely by the current combination of its inputs, without any memory or feedback from previous states. This means that the output of a combinational circuit is a direct function of the present input values and does not depend on any past inputs or states.
Combinational circuits do not store any state information. The output is purely based on the current inputs. These circuits are constructed using logic gates such as AND, OR, NOT, NAND, NOR, XOR, and XNOR.
Combinational circuits are often fast and suitable for real-time applications since the output is generated almost instantaneously as the inputs change.
Combinational circuits perform operations that can be described by Boolean logic, which involves binary variables and logical operations, so the circuit itself can be seen as a Boolean function