randRange(1, 4) randRange(1, 4) makeMatrix(randRange(-2, 4, DIM_1, DIM_2)) "\\textbf " + randFromArray("ABCDEF") printSimpleMatrix(MAT_A)

`PRETTY_MAT_ID = PRETTY_MAT_A`

What are the dimensions of matrix `PRETTY_MAT_ID`?

DIM_1 `\times` DIM_2

The first dimension is the number of rows in the matrix. How many rows does `PRETTY_MAT_ID` have?

DIM_1

The second dimension is the number of columns in the matrix. How many columns does `PRETTY_MAT_ID` have?

DIM_2

So, `PRETTY_MAT_ID` is a DIM_1 `\times` DIM_2 matrix.