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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> body { font-family: 'Open Sans', sans-serif; font-size: 14px; line-height: 1.42857143; color: #333; background-color: #fff; } h1 { font-size: 1.5em; margin-top: 0; margin-bottom: .5em; } </style></head><body> <h1>Hello World</h1> <script> var a = 1; var b = 2; var c = a + b; console.log(c); </script></body></html>