image in html bootstrap code example

Example 1: bootstrap 4 center image

/* used mx-auto d-block */

<img class="mx-auto d-block" src="https://www.w3schools.com/bootstrap4/paris.jpg" alt="https://www.w3schools.com/bootstrap4/paris.jpg"/>

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: How to insert an image in bootstrap 4

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

Example 4: responsive svg with bootstrap

.svg-container { 
	display: inline-block;
	position: relative;
	width: 100%;
	padding-bottom: 100%; 
	vertical-align: middle; 
	overflow: hidden; 
}