<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>DEMO - Lik</title> </head> <body> <script> var total = 10; console.log(total++); // 10 var total2 = 10; console.log(++total2); // 11 </script> </body> </html>
++ 在后，先赋值再 ++
++ 在前，先++再赋值
原文：http://www.cnblogs.com/likwin/p/7141925.html