Functional Components are static components.
Functional Components returns children components.
It has no lifecycles.

Example:

Import {View ,Text} from ‘react-native’;
const HelloWorld = ( ) => {
return (
<View>
<Text>Hello World</Text>
</View>
)
}

Here, function “HelloWorld” is declared as const.
It simply returns a component <Text> with value “Hello World” which is wrapped by parent <View> component
Functional Component is mainly suitable for static data.