Fibonacci done via Iteration and Recursion
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// Given a number N return the index value of the Fibonacci sequence, where the sequence is:
// 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144 ...
// the pattern of the sequence is that each value is the sum of the 2 previous values, that means that for N=5 → 2+3
//For example: fibonacciRecursive(6) should return 8
function fibonacciIterative(n){ //O(n)-> Time Complexity
//code here;
let arr=[0,1];
for(let i=2;i<n+1;i++){
arr.push(arr[i-1]+arr[i-2])
}
return arr[n]
}
fibonacciIterative(3);
function fibonacciRecursive(n) { //O(2^n)-> Time Complexity
//code here;
if(n<2){
return n;
}
return fibonacciRecursive(n-1)+fibonacciRecursive(n-2);
}
fibonacciRecursive(3)
JavaScript
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