The number e is one of the most famous irrational number, it is also known as Euler’s number. The first numbers in e are 2.7182818284590452353602874713527. e is also equal to 1/0! + 1/1! + 1/2! + 1/3! + 1/4! + 1/5! + 1/6! + 1/7! + … e is a transcendental number which means it is a non-algebraic number. e can be used as a logarithmic. e is also used in continuous compounding which is used to calculate interest. Thanks for reading my brief summary of e is and what it is used for.
Sources:
http://www.mathsisfun.com/numbers/e-eulers-number.html