JSFiddle - React, Tailwind, and code Playground

by Lena R

JavaScript

function fibonacci(a) { 

    var arr = [0, 1];// OK
 
    for(var i=2; i<=a; i++){            
        
	    var thirdNumber = arr[i-2] + arr[i-1];
       
        arr.push(thirdNumber);
		    }
    return thirdNumber;

var arg = thirdNumber;// здесь присваиваем фактическому параметру i-й элемент 
var result = fibonacci(arg);
console.log(arr(result));
}
fibonacci(arg);