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Logarithms
A logarithm is the inverse of an exponent.
24 = 16
log216 = 4
"log216" can be read as "log base 2 of 16", and means "the number of times 2 must be multiplied by itself to equal 16".
"log216" might also be written as log2(16)
Some more examples:
| Logarithm | Result |
|---|---|
| log22 | 1 |
| log24 | 2 |
| log28 | 3 |
| log216 | 4 |
| log1010 | 1 |
| log10100 | 2 |
| log101000 | 3 |
| log1010000 | 4 |
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Python Syntax
There isn't a language-level operator to calculate a logarithm, but we can import the math library and use the math.log() function.
import math
print(f"Logarithm base 2 of 16 is: {math.log(16, 2)}")
# Logarithm base 2 of 16 is: 4.0
Assignment
Let's create an "influencer score". It will be a small number (like less than 100) that will give influencers a metric for comparing their social media success against their peers.
Complete the get_influencer_score function. An influencer score is their average engagement percentage multiplied by log base 2 of their follower count.