Code Golf · #25 · 2026-04-29
Nth Fibonacci number
Difficulty 2/3 · JavaScript
How to play
Write a JavaScript function body that passes all test cases using the fewest characters. Run against examples first, then submit for the full test suite. Eagle < Birdie < Par.
Given n (0-indexed), return the nth Fibonacci number. F(0)=0, F(1)=1.
Examples
f(6) → 8
f(0) → 0
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Your code (function body — receives input)
function(input) { 0 chars
}
Write the shortest JavaScript function body that passes all tests · Back to hub