React Js Generate Random Number

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="text/babel">
      const { useState } = React;

function App() {
        const [randomNumber, setRandomNumber] = useState("");

function myFunction() {
          setRandomNumber(Math.random() * 100);
        }

return (
          <div id="app">
            <h2>React js Math.random() </h2>
            <p>Generate Random Number between 1-100 in React Js</p>
            <button onClick={myFunction}>click me</button>
            <p>Random Number = {randomNumber}</p>
          </div>
        );
      }
      ReactDOM.render(<App />, document.getElementById("app"));
    </script>

h2 {
        font-size: 24px;
        font-weight: bold;
        margin-bottom: 10px;
      }

p {
        font-size: 18px;
        margin-bottom: 10px;
      }

button {
        font-size: 18px;
        padding: 10px 20px;
        background-color: #4caf50;
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
      }

button:hover {
        background-color: #3e8e41;
      }

p:last-child {
        font-size: 24px;
        font-weight: bold;
      }
    </style>
  </body>
</html>

 
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="text/babel">
      const { useState } = React;
​
      function App() {
        const [randomNumber, setRandomNumber] = useState("");
​
        function myFunction() {
          setRandomNumber(Math.random() * 100);
        }
​
        return (
          <div id="app">
            <h2>React js Math.random() </h2>
            <p>Generate Random Number between 1-100 in React Js</p>
            <button onClick={myFunction}>click me</button>
            <p>Random Number = {randomNumber}</p>
          </div>
        );
      }
      ReactDOM.render(<App />, document.getElementById("app"));
    </script>
​
    <style>
      #app {
        text-align: center;
        font-family: Arial, sans-serif;
        padding: 20px;
      }
​
      h2 {
        font-size: 24px;
        font-weight: bold;
        margin-bottom: 10px;
      }
​
      p {
        font-size: 18px;
        margin-bottom: 10px;
      }
​
      button {
        font-size: 18px;
        padding: 10px 20px;
        background-color: #4caf50;
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
      }
​
      button:hover {
        background-color: #3e8e41;
      }
​
      p:last-child {
        font-size: 24px;
        font-weight: bold;
      }
    </style>
  </body>
</html>
​