* Added HTML Attributes
Wrote on the alt attribute and why it is good practice to use it. Also wrote on the condition where one can use the empty alt text.
* Made changes to img element
Removed the closing slash in img tag.
* fix: added newline
Remove ternary operator in React component, unnecessary operator to render null
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I added addition and subtraction of matrices with examples, I fixed and added to the definition, I added and put examples of how to get the position of a number in a matrix, I added a few more pictures, and I added a very basic way of multiplication of matrices.