Ya, as the others mentioned, if it is not on the machine, you have to purchase it seperately.
There are various solutions for office products:
There is Apple's iWork suite, which is essentally a 'copy' of the Microsoft Office products, there is Numbers (Excel), Pages (Word) and Keynote (PowerPoint).
Then there is of course the Microsoft Office for Mac, which is essentially the normal Word, Excel and Power Point that you are used to, just with a MAc 'interface' so it's different to use than the Windows version.
And then there are free office suites as Open Office, Libre Office, and Google Docs.
There are more options, just google for them. 😝
I personally use a mixture between iWork, Microsoft Office for Mac and Google Docs, all others only if it has to be.
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Kind regards, Alex.
Whoever finds spelling errors can keep them. For free! Awesome, right? 😀
 iPod Touch  iPhone 4
 MacBook Pro 2.26 GHz 8 GB RAM
 iMac 2.7 GHz i5, 8GB RAM