function Length=GetLength(iEnd,Nodes)

node_j=iEnd(1);
node_k=iEnd(2);

x_j=Nodes{node_j}.x;
x_k=Nodes{node_k}.x;

y_j=Nodes{node_j}.y;
y_k=Nodes{node_k}.y;

L=(x_k-x_j)^2+(y_k-y_j)^2;
Length=sqrt(L);



end