Python not Keyword

In Python, we use the "not" keyword when we want to change the boolean value of an expression that has already been evaluated. That is, the "not" keyword returns "True", if the expression evaluates to be "False", otherwise returns "False", if the expression evaluates to be "True". For example:

print(not True)
print(not False)

The output is:


Python not Keyword Truth Table

The truth table of the "not" keyword in Python is:

X not X
True False
False True

To reverse the truth value of a boolean expression, use the "not" keyword. For example, if x is True, then "not x" is False; conversely, if x is False, then "not x" is True.

Python not Keyword Example

Here is an example of the "not" keyword in Python:

print("Enter the Two Number: ", end="")
numOne = int(input())
numTwo = int(input())

x = numOne>numTwo
if not x:
    print("\nThe value", numOne, "is greater than", numTwo)
    print("\nThe value", numTwo, "is greater than", numOne)

print("\n\n\n@April Fool")

The snapshot given below shows the sample run of the above program, with user input of 10 and 30 as the first and second numbers:

python not keyword

The "not" keyword in the above program reversed the result or output.

Advantages of the not keyword in Python

Disadvantages of the not keyword in Python

Python Online Test

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