I'm running a for loop to find a numerical solution to a linear system of equations.

x1:=1

x2:=2

x3:=3

for i from 0 to 10 by 1 do

y1:= f(x2,x3);     <-------------- these are functions of variables solved using the initial approximations above.

y2:= f(x1,x3);

y3:= f(x1,x2);

x1:=y1;    <-------------- Reassignment statements

x2:=y2;

x3:=y3;

end do;