Given a variable <pre> <code class="csharp"> float

Given a variable

 
float num;

How it should be initialized so that the following code

 
if (num == num) 
    Console.WriteLine("Equal"); 
else 
    Console.WriteLine("Not equal");

would return
Not equal

0 / 0.0F operator produces a NAN result (not a number), Thus the (num == num) expression can not be considered from a logical point of view

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