Dots!, Dots!, Dots! What are they doing!?

Can some one explain to me what the 'dots', in the equation below, signify? What kind of mathematical operator do they represent?

 A(th+91,ph+1,:) =  ...
            reshape(exp(2*(0+1i)*pi/lambda*sind(th)* ...
            (B(:,1)*cosd(ph) + C(:,2)*sind(ph))),...
            [1 1 32]);

Thanks

Vijay

Answer 1

[Thorsten]

 help punct

gives you

... Continuation. Three or more periods at the end of a line continue 
      the current command or function call onto the next line. Three or 
      more periods before the end of a line cause MATLAB to ignore the 
      remaining text on the current line and continue the command or 
      function call onto the next line. This effectively makes a comment 
      out of anything on the current line that follows the periods.

[Vijay Nahar]

Got it! Thanks!

Answer 2

[Azzi Abdelmalek]

When your expression is too long, you can write it in multiple lines

Answer 3

[Sean de Wolski]

It's an "ellipsis"

http://www.mathworks.com/help/releases/R2015a/matlab/matlab_prog/continue-long-statements-on-multiple-lines.html