00_variables.html

<!DOCTYPE html>
<html>
<head>
<title>
    les variables
</title>
</head>
    
<body>

<p id="afficherIci"></p>

<script>
var x = 5;
var y = 6;
document.getElementById("afficherIci").innerHTML = x + y;
//document.getElementById("afficherIci").innerHTML = x;
//document.getElementById("afficherIci").innerHTML = y;
</script>

</body>
</html>