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<!DOCTYPE html> <html> <head> <title>Let's Coding Example</title> </head> <body> <div id="html-div"> </div> <script> let numbers = [1, 2, 3, 4, 2]; console.log(numbers.indexOf(2)); // 1 console.log(numbers.lastIndexOf(2)); // 4 </script> </body> </html>
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