MATLAB POLYSPACE RELEASE NOTES Manuale Utente Scaricare il pdf (Pagina 144)

4 Programming

else

b = x; fb = fx;

end

The result is a roo t of the polynomial x

-2x -5,namely

2.09455148154233

The cautions involving matrix comparisons that are discussed in the section

on the

if statement also apply to the while statement.

continue

The continue statement passes control to the next iteration of the for loop

while loop in which it appears, skipping any remaining statements in the

bodyoftheloop. Thesameholdstruefor

continue statements in nested

loops. That is, execution continues at the beginning of the loop in which the

continue statement was encountered.

The example below shows a

continue loop that counts the lines o f code in the

file

magic.m, skipping all blank lines and comments. A continue statement is

used to advance to the next line in

magic.m without incrementing the count

whenever a blank line or comment line is enco untered:

fid = fopen('magic.m','r');

count = 0;

while ~feof(fid)

line = fgetl(fid);

if isempty(line) | strncmp(line,'%',1)

continue

end

count = count + 1;

end

disp(sprintf('%d lines',co unt));

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MATLAB POLYSPACE RELEASE NOTES Manuale Utente Pagina 144