What does the " |%15d| " do again?

Hey guys,
just trying to remember what the ' | ' does in relation to using printf.
Eg:

Code:

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printf( "|%15d|", somevariable );

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I know I could probably write a program, but that shows me what it does and not necessarily explain what it does. Esspecially with the example we were given, being more complex than the above. Cheers,
Johannes

Thanks for that. I think i got confused because there are some where you have to put like a '%' or '\' and I had a look at those just before that. So no comments on the printout from the lecture didnt help me. Now I know. Cheers for that,
Johannes