javascript Write a function to calculate the specific number of a given position. E.g. the fibonacci sequence is … 1 1 2 3 5 8 13 … n code example

Example: fibonacci javascript

function fibonacci(num){ 
	var num1=0; 
	var num2=1; 
	var sum; 
	var i=0; 
	for (i = 0; i < num; i++){ 
		sum=num1+num2; 
		num1=num2; 
		num2=sum; 
	} 
	return num2; 
}