How do I format the whole document in sans-serif? [duplicate]

Possible Duplicate:
Simplest way to typeset entire document in sans serif (Helvetica)

I'd like to have all the font in my document to be sans-serif, i.e.:

``````\textsf{}
``````

What is the best and easiest way to set this globally?

Thanks,

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marked as duplicate by Lev Bishop, Marco Daniel, percusse, Ian Thompson, KurtOct 16 '12 at 18:54

``````% Helvet font throughout