How to Compute the Natural Logarithm (ln) of a Number in Python

John on May 13, 2021

A natural logarithm is the inverse of the exponential function. To get the natural logarithm (ln) of a number in Python, use the .log() function from the math package.

Import the math package then call math.log() function passing the number to compute to get its natural logarithm.

import math

nat_ln = math.log(1)

print(nat_ln)

0.0

Compute Natural Logarithm with NumPy

NumPy has a log() function – if you are already using NumPy you can save some memory by not importing math and using numpy.log() instead.

import numpy

nat_ln = numpy.log(1)

print(nat_ln)

0.0