function area = areaOfDisc(radius)
%areaOfDisc compute area of disc given radius
%
% consumes:
%    radius (scalar number)
%
% produces:
%
%    area: (scalar number)
%
%  
% examples:
%    >> areaOfDisc(2)
%    ans = 12.56
%
%    >>
% 
% (Used in example of "Design Recipe, inspired
%  by HTDP (www.htdp.org) )
% P. Conrad 10/16/06  for CISC106 Fall 2006


area = pi * radius ^ 2;
return;
end



