Answers for "latex command to create a matrix"

how to make matrix latex

documentclass{article}
usepackage[utf8]{inputenc}
usepackage{amsmath}
begin{document}
$$
begin{bmatrix} 
a & b & c \
c & d & d\
e & f & g \
end{bmatrix}
quad
$$
end{document}

how to write a matrix latex

documentclass{article}
usepackage{amsmath}
begin{document}

[
M=
  begin{bmatrix}
    1 & 2 & 3 & 4 & 5 \
    3 & 4 & 5 & 6 & 7
  end{bmatrix}
]

end{document}