How to output multiple figures?

As the code below, I generate a picture in each loop. How do I use saveas() to store every image in a given folder with the name 'image_i.png'(where i is a variable)? So I get ten images named image_1 to image_10.

for i = 1:10

    f = figure();
    hold on;
    plot(A);
    plot(B);
    text('');
    saveas(f,'c:\image_i.png')

end

Answer 1

[Chandrasekhar]

for i = 1:10
f = figure();
    hold on;
    plot(A);
    plot(B);
    text('');
    fileName = ['image_' num2str(i) '.png'];
    saveas(f,fileName);
end

[toby]

Thanks

Answer 2

[per isakson]

Warning: not tested

Replace

    saveas(f,'c:\image_i.png')

by

    saveas( f, sprintf( 'c:\\image_%i.png', i ) )