when I calculate a very small number, matlab gives1.12345e-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.
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
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