Question

How to generate NaN float value in C

Answer 1

#include <stdio.h>
#include <math.h>

int main(void)
{
    float f;

    f = nanf("");

    printf("%f", f);

    return 0;
}




/*
run:

nan

*/

 

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Answer 2

#include <stdio.h>
#include <math.h>

int main(void)
{
    float f = NAN;

    printf("%f", f);

    return 0;
}




/*
run:

nan

*/

 

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