81. What is the primary purpose of React Hooks?
82. In a functional component, how do you declare and use a state variable using the useState Hook?
83. Which built-in Hook is used for performing side effects in a functional component?
84. What is the purpose of the useEffect Hook in React?
85. In a functional component, how do you conditionally apply the useEffect Hook?
86. Which Hook allows you to perform data fetching and side effects in response to component updates?
87. In React, how do you create a custom Hook for reusing stateful logic across different components?
88. What is the primary benefit of using Hooks in React?
89. In a functional component, how do you update the state variable declared with the useState Hook?
90. What is the React Hook used for subscribing to context within a functional component?