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const fibonacci = function(count) {
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if (count < 0) return "OOPS";
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if (count === 0) return 0;
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let a = 0;
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let b = 1;
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for (let i = 1; i < count; i++) {
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// A slightly shorter version of the above solution:
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// [a, b] = [b, a + b];
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}
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return b;
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};
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module.exports = fibonacci;
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