# Import math Library

import math

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# 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))

​