print ($foo & 255) + 1, "hello";
prints the lower 8 bits of $foo and does not add 1 or print "hello" because the paran around $foo & 255 make print stop working at the ")" The 1 and "hello" are evaluated as seperate statements.
print +($foo & 255) + 1, "hello";
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<A HREF="http://www.piclist.com/techref/language/perl/expression.htm"> PERL Expressions</A>
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