javascript中变量的声明，赋值以及检测变量类型20190729
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>变量，变量的赋值及变量类型</title> </head> <body> <script type="text/javascript"> var name,age,profession; name="miss liu"; console.log(name); console.log(typeof name); age=18; console.log(age); console.log(typeof age); profession="老师"; console.log(profession); console.log(typeof profession); </script> </body> </html>