# Import math Library import math # Check whether some values are NaN print (math.isnan (56)) print (math.isnan (-45.34)) print (math.isnan (+45.34)) print (math.isnan (math.inf)) print (math.isnan (float("nan"))) print (math.isnan (float("inf"))) print (math.isnan (float("-inf"))) print (math.isnan (math.nan))