Store data in variable

Question

hello,

          I need help

I need to store data's inside variable for later use.

i have a file which look like this 

first,second,third,fourth

first,second,third,fourth

first,second,third,fourth

first,second,third,fourth

first,second,third,fourth

now i need to store these lines with all string ,did i need to use list or array.

thanks in advance