Borders between columns

Hello,

How do you put borders or lines between multiple
columns? For instance I have a three-columned page and
I want to put a line between the first and the second
column and second and the third column. How do I do it
that it looks like this:

xxxx | xxxx | xxxx
xxxx | xxxx | xxxx
xxxx | xxxx | xxxx
xxxx | xxxx | xxxx
xxxx | xxxx | xxxx
xxxx | xxxx | xxxx

Thanks,
Mete Kural


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