How does React handle hooks called from within conditional statements

When a hook is called from within a conditional statement, React will execute the hook only once, when the component is first rendered. This means that if the condition is false, the hook will not be executed again when the condition becomes true.

Here is an example of how this works:

javascript
import React, { useState } from 'react';

function Example() {
  const [count, setCount] = useState(0);

  if (count > 0) {
    setCount(count + 1);
  }

  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>Click me</button>
    </div>
  );
}

In this example, the `useState` hook is called once, when the component is first rendered. The condition `count > 0` is evaluated, and since it is false, the hook is not executed again when the condition becomes true.

This behavior is intentional and is designed to prevent the hook from being executed multiple times, which could lead to unexpected behavior or errors.

It's worth noting that this behavior only applies to hooks that are called from within conditional statements. If a hook is called from within a loop or a recursive function, it will be executed multiple times, as expected.

It's also worth noting that this behavior can be changed by using the `useCallback` hook, which allows you to memoize a function so that it is only executed once, even if the condition changes.