Introduction to MATLAB - Numerical Methods in Engineering with MATLAB - page 15

Loops shouldbe avoidedwheneverpossible in favor of vectorized expressions,
which execute much faster.Avectorized solution to the last computationwouldbe

>>n=0:5;
>>y=cos(n*pi/10)
y=
1.0000 0.9511 0.8090 0.5878 0.3090 0.0000

break
Any loop can beterminatedbythe break statement. Upon encountering a break
statement, the control is passed to the first statementoutside the loop. In the fol-
lowing example the function buildvec constructs arowvector of arbitrary length
by prompting forits elements. The process isterminatedwhenanempty element is
encountered.

functionx=buildvec
fori=1:1000
elem = input('==> '); % Prompts for input of element
if isempty(elem) % Check for empty element

break

end
x(i) = elem;

end

>>x=buildvec
==> 3
==> 5
==> 7
==> 2
==>
x=

3 5 7 2

continue
When the continue statement isencounteredinaloop, the control is passed to
the next iterationwithoutexecuting the statements in the current iteration. As an
illustration,consider the following function thatstrips all the blanks fromthe string s1 :

function s2 = strip(s1)
s2 = ''; % Create an empty string

fori=1:length(s1)