Logarithm
From Simple English Wikipedia, the free encyclopedia
Logarithms or logs are a concept of mathematics. A log is the inverse of exponentiation; this is, it tells you what exponent is needed to make a certain number. So since
,
the logarithm to a base 2 of 8 is 3, written thus:
Logarithms to base 10 are known as common logs and are usually written without the base; for example:
because 
[edit] Commmon bases for logarithms
| base | abbreviation | Comments |
|---|---|---|
| 2 | lg | Very common in Computer Science |
| e | ln | The base of this is the Eulerian number e, which is 2.718... |
| 10 | log | |
| any other number, n | logn | This is the general way to write logarithms |
