Did you try this? 
[%
    foo_1 = 'value1'
    foo_2 = 'value2'
    foo_3 = 'value3'
    foo_4 = 'value4'
    foo_5 = 'value5'
%]
[% FOREACH n = [ 1 .. 5 ] %]
    [% 'foo_' _ n %] is [% ${ "foo_$n" } %]
[% END %]

[download]
Anyway, apply here the usual arguments against variable variable names. Use a hash or an array, if you can.

Update: I misread the question. See geektron's reply.

In reply to Re: Template::Toolkit: better way to generate variable names? by larsen
in thread Template::Toolkit: better way to generate variable names? by geektron

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