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<html>3
<body>4
5
<h2>JavaScript Constants</h2>6
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<script>9
const USERNAME = "Ahmed";10
document.write("<b>"+ USERNAME +"<b><br>");11
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</script>13
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</body>15
</html><html><body><h2>JavaScript Constants</h2><script>const USERNAME = "Ahmed";document.write("<b>"+ USERNAME +"<b><br>");</script></body></html>