RosettaCodeData/Task/Fibonacci-sequence/Smalltalk/fibonacci-sequence-3.st

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Smalltalk
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2023-07-01 11:58:00 -04:00
Integer >> fibBinet
|phi rPhi|
phi := Float phi.
rPhi := 1 / phi.
^ (1 / 5 sqrt) * ((phi raisedTo:self) - (rPhi raisedTo:self))