Sum of a series: Difference between revisions

Content deleted Content added
→‎{{header|Forth}}: added haskell
Added Perl version.
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}
}
}
}

=={{header|Perl}}==
<pre>my $sum = 0;
map { $sum += 1 / ( $_ * $_ ) } (1..1000);
print "$sum\n";
</pre>