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Logical functions test for a condition to evaluate it as true or false, Logical functions can also evaluate parameters such as text or arithmetic operations that do not make a true or false statement. While each logical element or condition must always have a logic value of either "0" or "1", we also need to have ways to combine different logical signals or conditions to provide a logical result.

Some basic logical functions are:

AND:The AND gate implements the AND function. With the gate shown to the left, both inputs must have logic 1 signals applied to them in order for the output to be a logic 1. With either input at logic 0, the output will be held to logic 0. 

OR:The OR gate is sort of the reverse of the AND gate. The OR function, like its verbal counterpart, allows the output to be true (logic 1) if any one or more of its inputs are true. 

NOT:The inverter is a little different from AND and OR gates in that it always has exactly one input as well as one output. Whatever logical state is applied to the input, the opposite state will appear at the output.

Answer

A logical function is a function which is used to calculate or compare the given value and will return the output as true or false .such as..AND, OR, NOT….

Answer
AND,OR,NOT,XOR are all logical functions

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