What is the Small “e” in Scientific Notation / Double in Matlab

问题

when I calculate a very small number, matlab gives
1.12345e-15 What is this?
I can interpret it as 1.12345*10^(-15) or its 1.12345*e^(-15) I am in very hurry. Sorry for the stupid question.

回答1:

e represents scientific notation as Rahul said but it is base 10, not base e.

Run the following code to confirm.

1e1

It gives you

ans = 10

回答2:

e represents exponential. Its the scientific notation of writing numbers.

The base is 10. For example:

1e2 =100
1e-2= 0.01

来源：https://stackoverflow.com/questions/29731027/what-is-the-small-e-in-scientific-notation-double-in-matlab