State
There are two types of data that control components - State & Props. Anything that changes over time is known as state. If we had a Counter app, the state would be the Counter itself. we can initialize state in the constructor, and then call setState when we want to change it. The data inside react component is managed by State & Props. The component that uses state is mutable.they can be changed later on if required.
example:
In this example, we create Text component with state data.this data updated when we click on text.The event onPress call in setState. using setState we update the data.
