It's called the 'conditional' or 'ternary' operator. 
<condition> ? <do if condition was true> : <do if it wasn't>

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An example: 
$x == 1 ? print "x was '1'" : print "x was something else";

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----
I Go Back to Sleep, Now.

OGB

In reply to Re: "x ? y : z" notation by Old_Gray_Bear
in thread "x ? y : z" notation by apok

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