How to write a text header in text file? for example in the example below, how to write the header code salay month just once?

Code Salary Month
12   1000   12
14   1020   11
11   1212   9 


fid = fopen('analysis1.txt','wt');
for i=1:10
   array = []; % empty the array
   ....
   array = [code salary month];
   format short g;
   fprintf(fid,'%g\t %g\t %g\n',array); % write to file
end
fclose(fid);