How can I load 100 files with similar names and/or string in just one step in MATLAB?

fls = dir( 'int_*.ASC' );
for fi=1:numel(fls)
    A{fi} = importdata( fls(fi).name, ' ', 9 );
    % ...
end

UPDATE:
You may use string formatting to read the files according to their numbers:

for fi=1:100
    A{fi} = importdata( sprintf('int_%03d.ASC', fi ), ' ', 9 );
    % ...
end