x
<html><body><h2>JavaScript Sets</h2><p>Add variables to a Set:</p><p id="demo"></p><script>// Create a Setconst letters = new Set();// Create Variablesconst a = "a";const b = "b";const c = "c";// Add the Variables to the Setletters.add(a);letters.add(b);letters.add(c);// Display set.sizedocument.getElementById("demo").innerHTML = letters.size;</script></body></html>