How to place div side by side

How to place div side by side

Method 1:

.container{
    display: flex;
}
.fixed{
    width: 200px;
}
.flex-item{
    flex-grow: 1;
}

<div class="container">
  <div class="fixed"></div>
  <div class="flex-item"></div>
</div>

Method 2:

<div style="width: 100%; overflow: hidden;">
    <div style="width: 600px; float: left;"> Left </div>
    <div style="margin-left: 620px;"> Right </div>
</div>

Method 3:

<div style="width: 100%; display: table;">
    <div style="display: table-row">
        <div style="width: 600px; display: table-cell;"> Left </div>
        <div style="display: table-cell;"> Right </div>
    </div>
</div>

Reference:

https://stackoverflow.com/questions/2637696/how-to-place-div-side-by-side