Electric field computing

Electric Field Computing using Mat Lab:

write a MAT LAB program to calculate the Electric field of a charge  4 C

at a point  3 m far from the charge using the electric field equation:

                                                     E=q/r^2

MATLAB program:

r=3;                      % the distance between the charge q and the point
                             %   in (m)

q=4;                      % the charge in (C)

E=q/r^2;              % the Electric field in (C/m^2)

disp(E)