lovecoding
/
VIP30


			
				
					
						
						
							1234567891011121314151617181920212223242526272829303132
							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    //基本数据类型  number string boolean null undefined

    var a = 123;
    b = a
    console.log(b)

    // console.log(c)
    c = 22
    
    console.log(d)
    var d = 30

    var k = 123
    k = '小明'
    console.log(k)
    k = true 
    console.log(k)
    k = undefined
    console.log(k)
  </script>
</body>
</html>