What is the difference between a framework and a library

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Frameworks contain key distinguishing features that separate them from normal libraries:

inversion of control: In a framework, unlike in libraries or normal user applications, the overall program's flow of control is not dictated by the caller, but by the framework.
default behavior: A framework has a default behavior. This default behavior must be some useful behavior and not a series of no-ops.
extensibility: A framework can be extended by the user usually by selective overriding or specialized by user code to provide specific functionality.
non-modifiable framework code: The framework code, in general, is not supposed to be modified, while accepting user-implemented extensions. In other words, users can extend the framework, but should not modify its code.