What is the difference between Promises and Observables?

Question

What is the difference between Promise and Observable in Angular?

An example on each would be helpful in understanding both the cases. In w

Answer 1

1. Promises are focused only for single values or resolves, observables are stream of data.

2. Observables can be canceled but promises can't be canceled.

The least known one, atleast to me is

3. Promises are always of asynchronous nature, but observables can be both synchronous and asynchronous.