The Code:
<img src="The URL of the image">

    Format
Your image format must be .gif , .GIF, .jpg or.JPG. If your images are in .bmp or .art format they will not show. Open the .bmp or .art in your image editor and save it as jpg or gif .

   Warning
The name and the location of the image are case sensitive.
https://www.angelfire.com/images/images2/bart.gif 
is not the same as
https://www.angelfire.com/images2/Bart.gif
or
https://www.angelfire.com/images/images2/BART.GIF

  
This is an image code  <img src="images2/bart.gif">

<IMG SRC="images2/bart.gif" ALT="Bart" BORDER=0 HEIGHT=148 WIDTH=110>

   Using the width and height of the image, is recommended, if the image did not show the browser would  reserve the space for the image in this case your page keeps the same look, everything stays in the same place where you put it.

   If there is an ugly border around your image link just add BORDER=0 to take it off. An image as a link can take the clicker to another page, a different image, music, or even a file for downloading.