<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>变量</title> </head> <body> </body> </html> <script> <!--变量--> let a = 20.0; let b = 20; let c = "hello world"; console.log(a) console.log(b) console.log(c) let d = true; console.log(d) //基础语法 if for 一模一样 let e = new Object(); console.log(e) let f = new Date(); console.log(f) </script>
