How do I generate a string during a loop

I'm looking to generate a string, such as 'grape', when a certain value, say, 0.5, is encountered during a loop. How do I do this?

[per isakson]

if abs( certain_value - 0.5 ) <= eps( certain_value )
    grape = 'Cabernet Sauvignon';
end

[Eric]

 if value==0.5
     'grape'
 end

If you want to actually do something with it, save it in a variable. Not sure what you want to do with the 'grape' string.

[Kevin Hartman]

Thank you, this will work.