lovecoding
/
W0407


			
				
					
						
						
							1234567891011121314151617181920
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var a = 5;
        var b;
        // 先赋值 后自增
        // b = a++;
        // console.log(a,b);
        // 先自增 后赋值
        b = ++a;
        console.log(a,b);
    </script>
</body>
</html>