abstract：<!DOCTYPE html> <html> <head> <title>javaScript变量</title> </head> <body> <script type="text/javascript"> va
<!DOCTYPE html> <html> <head> <title>javaScript变量</title> </head> <body> <script type="text/javascript"> var x=3; document.write(x); </script> </body> </html>
Correcting teacher：西门大官人Correction time：2019-04-02 10:42:04
Teacher's summary：变量是有期作用域的，分类全局变量和局部变量