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30-seconds-of-code/snippets/fibonacci_until_num.md
2019-08-20 10:09:53 +03:00

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---
title: fibonacci_until_num
tags: math
---
Returns the n-th term in a Fibonnaci sequence that starts with 1
A term in a Fibonnaci sequence is the sum of the two previous terms.
This function recursively calls the function to find the n-th term.
```py
def fibonacci_until_num(n):
if n < 3:
return 1
return fibonacci_until_num(n - 2) + fibonacci_until_num(n - 1)
```
```py
fibonnaci_until_num(5) # 5
fibonnaci_until_num(15) # 610
```