Data Science, Artificial Intelligence, Machine Learning, Programming, Mathematics.
italic letter, as $boldsymbol{A}$. For instance, you can have: $$ boldsymbol{A} = begin{bmatrix} 1 & 2 3 & 4 5 & 6 end{bmatrix} $$ The matrix $boldsymbol{A}$ contains three rows and two columns. You can think of it as two column vectors or as three row vectors. Let’s take an example creating a