JQuery Fibonacci Tree

I was recently questioned by Hannah Suppiah about writing code to calculate fibonacci numbers and it brought my uni days flooding back. As an illustrative tool and a quick bit of nostalgia, I wrote this simple JQuery example of the fibonacci tree.

There 2 lines of JQuery needed to work out the n’th fibonacci number.

{.js name="code"} function fib(n){ if(n<=1){//if we are trying to get the first number then return it return 1; } //otherwise return the sum of the last 2 return fib(n-1)+fib(n-2); }

Because a fibonacci number is defined as the sum of the previous 2, as simple bit of recursion is required to calculate it (re-cursing down until we get to a known value [i.e 1]).