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C++ 'Not' Keyword With Example

Prashant | Wed, 05 Aug, 2020 | 108

CPP 'not' Keyword with Example

"not" is an inbuilt keyword that has been around since at least C++98. It is an alternative to ! (Logical NOT) operator and it mostly uses with the conditions.

The not keyword returns 1 if the result of the given condition is 0, and it returns 0 if the result of the given condition is 1.

Syntax:

    not operand;

Here, operand is the operand.

Example:

    Input:
    a = 10;
    b = 20;
    
    result = not(a < b);

    Output:
    result = 1

C++ example to demonstrate the use of "not" keyword

// C++ example to demonstrate the use of 
// 'not' operator.

#include <iostream>
using namespace std;

int main()
{
    int num = 20;

    if (not(num >= 10 and num <= 50))
        cout << "true\n";
    else
        cout << "false\n";

    if (not(num >= 20 and num <= 50))
        cout << "true\n";
    else
        cout << "false\n";

    if (not(num > 50 and num <= 100))
        cout << "true\n";
    else
        cout << "false\n";

    return 0;
}

Output:

false
false
true

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