<style>
    div{
        border: 1px solid red;
        width: 100px;
    }
    .div1{
        width: 100px;
        height: 100px;
        /*外边距*/
       /* margin: 50px; */
    }
    .div2{
        width: 200px;
        height: 200px;
        padding: 50px;
        /*
            设置盒子的属性，让width和height就是最终盒子的大小
         */
        box-sizing: border-box;
    }

    .div3{
        float: left;
    }

    .div4{
        float: left;
    }

    .div5{
        float: right;
    }

</style>

<div  class="div2">
        <div class="div1"></div>

</div>

<div class="div3">aaaa</div>
<div class="div4">bbbbb</div>
<div class="div5">cccc</div>

		* float：浮动
			* left
			* right

css属性2