what is log

can u tell me by talking of an eg ple.........

clear my consept as possible soon.

An exponent used in mathematical equations to express the level of a variable quantity (or, the power to which a number must be raised to produce a specific result) is called logarithm or log.
For example, follow the link provided below.
https://www.meritnation.com/ask-answer/question/pls-tell-me-how-to-solve-log-problems-with-certain-examples/equilibrium/3272079