isunordered() in C++

isunordered(): This function is available in the file cmath. This function checks whether x or y are unordered values. If one or both arguments are NAN, then it returns true. So unordered values are NAN.

This function returns true if x or y is NAN otherwise, it returns false.

Parameters: Two parameters are required for this function.

x: The first value.

y: The second value.

Syntax:

isunordered(x,y)

For Example:

isunordered(NAN,9) = > It return true, because one of the argument is NAN.

isunordered(12,9) = > It returns false, because any of the arguments are not NAN.

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{

    float x = NAN, y = 9;
    cout << isunordered(x, y) << "\n";

    return 0;
}