Please i need help in writing a code on a recursive function

Question

In writing a program that takes in an interger n and returns An where An=An-1+An-2. and given Ao=1,A1=1,A2=2.

Answer 1

Someone can help you here but they need to know which language and see what you have written so far. Please read the following:
https://code.sololearn.com/Wek0V1MyIR2r/?ref=app

https://code.sololearn.com/W3uiji9X28C1/?ref=app