What is the difference between Strategy design pattern and State design pattern?

Question

What are the differences between the Strategy design pattern and the State design pattern? I was going through quite a few articles on the web but could not make out the dif

Answer 1

'Strategy' is only an algorithm that you can change it in different circumstances upon your need, and it processes something for you. Ex. you can choose how compress a file. zip or rar ... in a method.

But 'State' CAN change all your object behaviour, when it changes, Even it can change other fields... that's why it has a reference to its owner. You should notice that changing an object field can change object behaviour at all. Ex. when you change State0 to State1 in obj, you change an integer to 10.. so when we call obj.f0() that do some calculation and use that integer, it affects the result.