% ECE 1250 S12 Lecture M10

% Today's lecture focuses on control flow:
% 1) if, else, elseif, end conditionals
% 2) switch statements
% 3) for loops
% 4) while loops

% Suppose we want to translate resistor color codes into values.
% We start with colors stored in three string variables.
color1 = 'brown';
color2 = 'black';
color3 = 'red';

% We now create the R_code.m function to convert colors to an R value.

% R_code.m       Convert three strings containing colors of bands on R to R value.
%--------------------------------------------------------------------------------

% Notes on 'for' loops:
A = eye(3)
for index = A         % index will equal the columns of eye(3) as loop executes.
  index = index       % Print out value of index.
  index = 3           % We can change the value of index but that will not change the
                      %  value of index next time thru loop.
  A = magic(3);       % Will this change the next value of index?   No.  The values of
                      %  the array for index is stored at the outset of the loop.
end

% Note: we can use a break statement to exit a loop early.


% 'While' loops are convenient for certain tasks with less structure.

% rand_int.m    Generate random numbers until we get one that is almost an integer
%--------------------------------------------------------------------------------

% Note: it's easy to end up with an infinite loop that never exits.  Use CNTRL-C to stop.