Check out example codes for "html img src". It will help you in understanding the concepts better.
Code Example 1
<img src="url" alt="alternatetext">
Code Example 2
<img src="the source image's url" alt="the image's description">
Code Example 3
<img href="https://website.com/image.jpg">
<!-- for an image online -->
<img src=C:\your_files>
<!-- for a local file -->
Code Example 4
<img src="img_girl.jpg" alt="Girl in a jacket" width="500" height="600">
Code Example 5
<img src="image.jps">
//image.jpg is where you would put the inage source.
Code Example 6
<img src="smiley.gif" alt="Smiley face" height="42" width="42">
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