JSFiddle - React, Tailwind, and code Playground

by Lena R

JavaScript

function fibonacci(a) { 

    var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];// OK
 
    for(var i=2; i<=a; i++){         
                       
	    var thirdNumber = arr[i-2] + arr[i-1];
        
        arr.push(thirdNumber);
		}
    return thirdNumber;

}
console.log(fibonacci(2));
console.log(fibonacci(4));
console.log(fibonacci(7));