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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript ES6 let Keyword</title> </head> <body> <script> // ES6 syntax for(let i = 0; i < 5; i++) { document.write(i + "<br>"); // 0,1,2,3,4 } document.write("<hr>" + i + "<hr>"); // undefined // ES5 syntax for(var i = 0; i < 5; i++) { document.write(i + "<br>"); // 0,1,2,3,4 } document.write("<hr>" + i); </script> </body> </html>
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