7 lines
158 B
Raku
7 lines
158 B
Raku
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sub fib (Int $n --> Int) {
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$n > 1 or return $n;
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my ($prev, $this) = 0, 1;
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($prev, $this) = $this, $this + $prev for 1 ..^ $n;
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return $this;
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}
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