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break

Terminate execution of for or while loop

Syntax

break

Description

break terminates the execution of a for or while loop. Statements in the loop that appear after the break statement are not executed.

In nested loops, break exits only from the loop in which it occurs. Control passes to the statement that follows the end of that loop.

Examples

The example below shows a while loop that reads the contents of the file fft.m into a MATLAB® character array. A break statement is used to exit the while loop when the first empty line is encountered. The resulting character array contains the command line help for the fft program.

fid = fopen('fft.m','r');
s = '';

while ~feof(fid)
    line = fgetl(fid);
    if isempty(line) || ~ischar(line)
        break
    end
    s = sprintf('%s%s\n', s, line);
end
disp(s);

fclose(fid);

More About

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Tips

break is not defined outside a for or while loop. Use return in this context instead.

See Also

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