Python cmath.isnan() Function

Mathematics

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math module

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math.factorial()

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math.isfinite()

math.isinf()

math.isnan()

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math.nan

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cmath.atanh()

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cmath.cosh()

cmath.exp()

cmath.isclose()

cmath.isfinite()

cmath.isinf()

cmath.isnan()

cmath.log()

cmath.log10()

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cmath.rect()

cmath.sin()

cmath.sinh()

cmath.sqrt()

cmath.tan()

cmath.tanh()

cmath.e

cmath.inf

cmath.infj

cmath.nan

cmath.nanj

cmath.pi

cmath.tau

The cmath.isnan() function checks if the input argument is a NaN (Not a Number) value. NaN is a special floating-point value indicating that the result of a computation is undefined, unrepresentable, or not a number.

cmath.isnan(x)

`x`	The value(real or complex) to be tested. If the input value is a real number, it is first converted to a complex number before the operation.

The function returns True if x is a NaN , False otherwise.

import cmath

print(cmath.isnan(5))
print(cmath.isnan(float('nan')))
print(cmath.isnan(complex('nan')))
print(cmath.isnan(cmath.nan))