Type a matrix using nested curly braces:

Use MatrixForm to format a matrix as a 2D array:

Choose Insert ▶ Table/Matrix ▶ New..., select Matrix, enter the numbers of rows and columns and click OK. Use to move through successive matrix positions, filling in values:

Create a matrix with any function that returns a list of equal-sized lists, for example, Table:

• Many functions are available for creating special types of matrices, for example, DiagonalMatrix, ConstantArray and HilbertMatrix.