Why is (sizeof(int) > -1) false? [duplicate]

Answer 1

It's because the sizeof operator returns an unsigned integer type. When compared with a signed integer type, the signed integer is converted to unsigned. So in effect, you were comparing sizeof(int) against the largest possible unsigned integer.

You can force the size to signed by casting:

#include 

int main()
{
    if((int)sizeof(int) > -1)
    {
            printf("\nTrue\n");
    }
    else
    {
            printf("\nFALSE\n");
    }
}