js
<!DOCTYPE html> <html lang="zh-cn"> <head> <meta charset="UTF-8" /> <title>Document</title> </head> <body> <script> function a(){ var d =100 ; return function(){ return d++; } } var b= a(); b(); b(); alert(b()); </script> </body> </html>
闭包函数..
Scope
Closure (a) 闭包