Question

How do I calculate the logarithm of a number in Python?

Answer 1

To calculate the logarithm of a number in Python, you can use the math.log() function. This function takes two arguments: the first argument is the number whose logarithm you want to calculate, and the second argument (optional) is the base of the logarithm. If the second argument is not provided, the default base is e (natural logarithm). 

Here's an example code:

import math

num = 100
log_num = math.log(num, 10)

print("The logarithm of", num, "to base 10 is", log_num)
 

In this example, the math.log() function takes the argument num and the base 10 and returns the logarithm of num to base 10, which is assigned to the variable log_num. The result is then printed using the print function.

You can replace the value of num with any other positive number and the base with any other positive number (including e) to calculate the logarithm of the number to a different base using the same code. If the base argument is not provided, the function will use the natural logarithm (base e).