bootstrap fluid img code example

Example 1: how to make image responsive bootstrap 4

<img src="..." class="img-fluid" alt="Responsive image">

Example 2: bootstrap Image thumbnails

In addition to our border-radius utilities, you can use 
.img-thumbnail to give an image a rounded 1px border appearance.

<img src="..." alt="..." class="img-thumbnail">

Example 3: img-fluid bootstrap

<img class="img-fluid" src="" alt=""> //This will make your image responsive

Example 4: How to insert an image in bootstrap 4

<img src="path to image" class="description" alt="Rounded Image">