go deeper in the code & explain me each and everything like a pro tutor
import React, { useState } from "react";

function App() {
 const [tasks, setTasks] = useState([]);

 function addTask(newTask) {
 setTasks([...tasks, newTask]);
 }

 function deleteTask(index) {
 setTasks(tasks.filter((task, i) => i !== index));
 }

 return (
 
 {
 e.preventDefault();
 const newTask = e.target.elements.task.value;
 addTask(newTask);
 e.target.reset();
 }}
 >
 
 Add task
 
 
 {tasks.map((task, index) => (
 * {task}
 deleteTask(index)}>Delete

 ))}
 
 );
}
export default App;
go deeper in the code & explain me each and everything like a pro tutor
import React, { useState } from "react";

function App() {
 const [tasks, setTasks] = useState([]);

 function addTask(newTask) {
 setTasks([...tasks, newTask]);
 }

 function deleteTask(index) {
 setTasks(tasks.filter((task, i) => i !== index));
 }

 return (
 
 {
 e.preventDefault();
 const newTask = e.target.elements.task.value;
 addTask(newTask);
 e.target.reset();
 }}
 >
 
 Add task
 
 
 {tasks.map((task, index) => (
 * {task}
 deleteTask(index)}>Delete

 ))}
 
 );
}
export default App;

This is a simple React application that allows the user to add tasks and delete them. Here's a breakdown of the code:

1. Importing React and useState from the 'react' library. useState is a hook that allows functional components to have state.

```javascript
import React, { useState } from "react";
```

2. Defining the App component. This component maintains the state of the tasks and provides functions to add and delete tasks.

```javascript
function App() {
```

3. Using useState to initialize an empty array for tasks and a function to update the tasks state.

```javascript
 const [tasks, setTasks] = useState([]);
```

4. Defining a function addTask that takes a new task as an argument, updates the tasks state with the new task, and resets the form.

```javascript
 function addTask(newTask) {
   setTasks([...tasks, newTask]);
 }
```

5. Defining a function deleteTask that takes an index as an argument, filters the tasks array to exclude the task at the given index, and updates the tasks state with the new array.

```javascript
 function deleteTask(index) {
   setTasks(tasks.filter((task, i) => i !== index));
 }
```
Let's break down the code step by step, and I'll explain each part in detail.

**Importing React and useState**
```
import React, { useState } from "react";
```
Here, we're importing two things from the `react` library:

1. `React`: This is the main React library, which provides the functionality for building React applications.
2. `useState`: This is a hook provided by React, which allows us to add state to functional components. We'll use it to manage the state of our application.

**Defining the App component**
```
function App() {
  //...
}
```
Here, we're defining a functional component named `App`. This component will render the UI for our to-do list app.

**Initializing state with useState**
```
const [tasks, setTasks] = useState([]);
```
Here, we're using the `useState` hook to initialize a state variable `tasks` with an initial value of an empty array `[]`. The `useState` hook returns an array with two elements:

1. `tasks`: The current value of the state variable.
2. `setTasks`: A function that updates the state variable.

In this case, `tasks` is an array that will store the list of tasks, and `setTasks` is a function that will update the `tasks` array.

**Defining the addTask function**
```
function addTask(newTask) {
  setTasks([...tasks,