fibonacci

Calculates the n-th number in the Fibonacci sequence.

Syntax

fibonacci(num: number): number

Parameters

Name	Type	Description
n	number	Non-negative integer index.

Return

Type	Description
number	The nth Fibonacci number.

Example

fibonacci(0); // 0
fibonacci(1); // 1
fibonacci(6); // 8

Notes

• Throws TypeError if the argument is not a non-negative integer.
• Recursive implementation; for large values, consider an iterative approach.

References

• MDN: Fibonacci number