What does "e" mean in math?

The number notated by "e" is a famous irrational number known as Euler's number that is approximately equal to 2.72. The number "e" has no final digit and has been calculated accurately to over one trillion digits.

Irrational numbers, like "e" and pi, cannot be written as the ratio of two numbers. The best method of calculating approximate values of "e" is to divide one by any number "n," then add one and raise that result to the power of "n." The larger the value of "n" is, the closer the result approaches "e." One use for "e" is in problems of continuously compounded interest.