How can I check for NaN values?

Question

float('nan') results Nan (not a number). It is very easy but how can I check?

Answer 1

You can use math.isnan() which will return True if the variable is a NAN else False

Syntax-

math.isnan(variable)

Alternatively, another way to test for NaN is comparing the number to itself.

def isNaN(num):

   return num != num