Write to a text file sequentially every time in next line

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MatLab

programming

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Hello

How can i write to a text file every time start from the next line, for example say i have a text file "test.txt" and i have an iterative code that prints say "hello" what i want is hello to be print on next line every time like this

hello
hello
hello

so far i have used

 ta='text.txt';
fid = fopen((ta), 'a');
Loop{ fprintf(fid,'%s\n',word); }

any help is warmly appreciated.