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<!DOCTYPE html>
<html>
<head>
<title>Ejemplo de JavaScript</title>
<meta charset="UTF-8">
</head>
<body>
<script>
let x;
x = 1;
while (x <= 100) {
document.write(x);
document.write('<br>');
x = x + 1;
}
</script>
</body>
</html>