Ln (Natural Log) in Python

In Python, calculating the natural logarithm (ln), which is the logarithm to the base e (where e ≈ 2.71828), is straightforward using the built-in math module. The natural log is commonly used in mathematics, statistics, and scientific computations.

How to calculate natural log (ln) in Python:

Use the math.log() function from the math module:

import math

result = math.log(10)

print(result)  # Output: 2.302585092994046

 By default, math.log(x) calculates the natural logarithm (ln) of x.

If you want to use a different base, such as base 10 or base 2, you can pass the base as a second argument:

math.log(100, 10)  # Output: 2.0 (log base 10)

math.log(8, 2)     # Output: 3.0 (log base 2)

Points to remember:

• The input value must be greater than 0; otherwise, you'll get a ValueError.
  
• For base 10 logs, you can also use math.log10(x).
  
• For base 2 logs, use math.log2(x).
  

Summary:

• Use math.log(x) for the natural log.
  
• Make sure x > 0 to avoid errors.
  
• Other log bases are also supported with either a second argument or specific functions like log10() or log2().
  
• The math.log() function makes it easy to calculate natural logs with high precision, making it a go-to choice for anyone doing numerical or scientific work in Python.