What characterizes an OR gate's function in digital logic?

The function of an OR gate in digital logic is characterized by its ability to produce a high output, or a logic '1', when at least one of its inputs is high. This means that the OR gate evaluates the state of its inputs and responds by outputting a '1' any time it receives a '1' from any input. This behavior is crucial in digital circuits, as it allows for flexible combinations of input signals to control the output.

For instance, if you have two inputs, A and B, the following scenarios illustrate how the OR gate operates:

• If A is 0 and B is 0, the output is 0.

• If A is 0 and B is 1, the output is 1.

• If A is 1 and B is 0, the output is 1.

• If A is 1 and B is 1, the output is 1 as well.

Therefore, since the correct answer specifies that the output is '1' if at least one input is '1', it accurately describes the fundamental operation of an OR gate in digital logic systems.