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fetchData();

State persists across re-renders; updating state triggers a re-render. 2. useEffect – Handling Side Effects Goal: Replace lifecycle methods ( componentDidMount , componentDidUpdate , componentWillUnmount ). The Complete React Native Hooks Course

export default function Counter() const [state, dispatch] = useReducer(reducer, initialState); State persists across re-renders

import React, useState from 'react'; import View, Text, Button, TextInput from 'react-native'; export default function UserInput() const [name, setName] = useState(''); const [submitted, setSubmitted] = useState(false); dispatch] = useReducer(reducer