||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */

{{{
M.swap_rows(0,3)
print M
M.swap_rows(2,1)
print M.det()
N=matrix([[1,2,3,0],[2,6,6,1],[-1,0,0,3],[0,2,0,7]])
print N
N1=N.echelon_form()
print N1
N1.det()
N2=matrix([[2,1,1,1],[1,2,1,1],[1,1,2,1],[1,1,1,2]])
print N2
N3=N2.echelon_form()
print N3
N3.det()}}}

/* code_ends */

 * '''Solution by''': 
   * <C.pratyusha>, <Student>, <SNIST>
   * <Reepu Kumari>, <Student>, <SNIST>
   * <Renuka.Y>,<student>,<SNIST>