Check if is NaN code example

Example 1: python test is nan

math.isnan(n)

Example 2: javascript check if is nan

function isNaN(x) {
   return x !== x;
};
isNaN(NaN);//true

Example 3: check if something is nan python

import math
print math.isnan(float('NaN'))OutputTrue
print math.isnan(1.0)OutputFalse

Example 4: check if value is NaN

Number.isNaN(123)

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