Solution

The function MatrixForm will print the list in two-dimensional form.

In[42]:=

(*1*)A = {{1, 2, 3}, {4, 5, 6}} ; MatrixForm[A]

Out[43]//MatrixForm=

( {{1, 2, 3}, {4, 5, 6}} )

In[44]:=

(*2*)A[[2]]

Out[44]=

{4, 5, 6}

In[45]:=

(*3*)A[[1, 3]]

Out[45]=

3

In[46]:=

(*4*)A[[2, 1]]

Out[46]=

4

In[47]:=

(*5*)% + %%

Out[47]=

7

In[48]:=

Clear[A]

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