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                <!DOCTYPE html>
        <title>Cours JavaScript</title>
        <meta charset="utf-8">
        <meta name="viewport"
          content="width=device-width, initial-scale=1, user-scalable=no">
        <link rel="stylesheet" href="cours.css">
        <script src='cours.js' async></script>
        <h1>Titre principal</h1>
        <p>Un paragraphe</p>
        <p id='p1'></p>
        <p id='p2'></p>




                let prez = 'Bonjour, je suis Pierre';

/*Math.random() génère un nombre décimal aléatoire entre 0 et 1 qu'on
 *place ici au sein de notre paragraphe  p id='p1'*/
document.getElementById('p1').innerHTML = Math.random();

/*String.replace() chercher une expression dans une chaine de caractères
 *et la remplace par une autre. Ici, on cherche "Pierre" dans let prez et
 *on remplace par "Mathilde" avant d'afficher le résultat dans p id='p2'*/
let prez2 = prez.replace('Pierre', 'Mathilde');
document.getElementById('p2').innerHTML = prez2;