The lamp is ON. It lights up!
Gate by gate
- NOT B → NOT OFF = ON
- A AND NOT B → ON AND ON = ON
- C AND D → OFF AND ON = OFF
- (A AND NOT B) OR (C AND D) → ON OR OFF = ON
The same circuit in Python
Python has the same three gates built in: and, or and not. ON is True and OFF is False.
A = True
B = False
C = False
D = True
lamp = (A and not B) or (C and D)
print("Is the lamp on?", lamp)When you run it, it prints:
Is the lamp on? True
Try it: change one of the switches from True to False (or the other way round) and run the code again. Can you find a switch that changes the lamp?