How to use math.log Function in Python

Python is a popular programming language for scientific computing and mathematics because it is easy to learn and easy to use.

A common function in mathematics is the log function, which allows you to compute the logarithm of a number.

In this post, we'll learn how to use the log function in Python.

How to use the log function

Thankfully, Python has a built-in function for the log function.

Python offers users the math module that contains many useful mathematical functions and constants.

Included in this module is the log() function which we'll use to compute the logarithm of a number.

Simply import the math module and use the log() function.

PYTHON
import math

results = math.log(2);

print(results);

BASH
0.6931471805599453

If you want to calculate the logarithm base 2 of a number, you can use the log2() function.

PYTHON
import math

results = math.log2(2);

print(results);

BASH
1.0

If you want to calculate the logarithm base 10 of a number, you can use the log10() function.

PYTHON
import math

results = math.log10(1000);

print(results);

BASH
3.0

Alternatively, you can just pass in your own base, and the log function will take care of the rest.

PYTHON
import math

results = math.log(25, 5);

print(results);

BASH
2.0

In this case, the first parameter is the number you want to take the logarithm of, and the second parameter is the base of the logarithm.

Conclusion

In this post, we learned how to use the log function in Python.

Simply import the math module and that gives you access to all the log functions including log2(), log10(), and log().

Thanks for reading and happy coding!

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