On Tue, 20 Nov 2001 14:22:36 +0000, in perl.fwp you wrote: > sub f { > $f[$_[0]] or $f[$_[0]]=$_[0]<=1?$_[0]:f($_[0]-1)+f($_[0]-2) > } > print f(25); The 'or' looks as if wants to be replaced with a '||='. Cheers, Philip