Three Circular Loops

%% Three Circular Loops
% Calculates the magnetic field in three scenarios with a line and a
%   circular loop: They are in the same direction, the opposite direction,a
%   and they are perpendicular to each other

% Constants
muNaught = 4*pi*10^-7;                  %[T*m/A] Vacuum Permeability

% Inputs and Variables
I = input('What is the current?\n');
r = input('What is the radius of the circle?\n');

% Output and Equations
Bline = muNaught*I/(2*pi*r);
Bcircle = pi*Bline;
B = [Bline+Bcircle; abs(Bline-Bcircle); sqrt(Bline^2+Bcircle^2)];
fprintf(['The magnitudes for the circle and loop in the same direction,\n'...
        'opposite direction, and perpendicular are:\n'...
        '%.4e T, %.4e T, and %.4e T\n'], B(1), B(2), B(3))