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Exercise:
Use the += operator to add a value of 5 to the variable x.
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<!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var x = 10; // add code here document.getElementById("demo").innerHTML = x; </script> </body> </html>
<!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var x = 10; x += 5; document.getElementById("demo").innerHTML = x; </script> </body> </html>
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