SSIS Variables vs Parameters (SSIS Denali)

Question

1. What is the difference between Variables and Parameters in SSIS Denali?
2. If there is any difference then What is that which Variables cannot do that Parameter

Answer 1

FYI, in short, variable's value can be changed during the runtime, but parameter cannot. Parameter can help you do the project deployment and you can set it up in SSISDB catalog, while variable cannot.