1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
    6.     <title>Document</title>
    7. </head>
    8. <body>
    9.     <script>
    10.         var age=5;
    11.         if(age>=18){
    12.             console.log("成年人")
    13.         }
    14.         else if(age>12){
    15.             console.log("青少年")
    16.         }
    17.         else if(age>6){
    18.             console.log("少年")
    19.         }
    20.         else{
    21.             console.log("小屁孩")
    22.         }
    23.     </script>
    24. </body>
    25. </html>