fibonacci sequence

1public class Numbers {
2	public static void FibannaciNumbers(int n) {
3        int x = 0;
4        int y = 1;
5        if(n >= 1) {
6            System.out.print(x + " ");
7        }
8        if(n >= 2) {
9            System.out.print(y);
10        }
11        if (n > 2) {
12            for(int a = n - 2; a > 0; a--) {
13                int z = y + x;
14                System.out.print(" " + z);
15                x = y;
16                y = z;
17            }
18        }
19    }
20}

10, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

1def fibonacci(n):
2    if n <= 0:
3        return 0
4    elif n == 1:
5        return 1
6    else:
7        return fibonacci(n-1) + fibonacci(n-2)

1// Copy paste code here https://play.golang.org/
2package main 
3
4import "fmt"
5
6func fibo(n int) int {
7	x, y := 0, 1
8	for i := 0; i < n; i++ {
9		x, y = y, x+y
10	}
11	return x
12}
13
14func main() { fmt.Println(fibo(5)) } // return 5

1// Copy pastecode here https://play.golang.org/
2package main
3
4import "fmt"
5
6func fibo(n int) int {
7	x, y := 0, 1
8	for i := 0; i < n; i++ {
9		x, y = y, x+y
10	}
11	return x
12}
13
14func main() {
15	for i := 0; i < 10; i++ {
16		fmt.Println("fibo of", i, "is", fibo(i))
17	}
18}
19

1//x is the index number in the fibonnacci sequence. 
2//The function will return that index's fibonacci value
3function fib(x) {
4    let a = 0;
5    let b = 1;
6    for (var i = 0; i < x-1; i++) {
7        let c = b;
8        b += a;
9        a = c;
10    }
11    return b;
12}

1function myFib(n) {
2    if (isNaN(n) || Math.floor(n) !== n)
3        return "Not an integer value!";
4    if (n === 0 || n === 1)
5        return 3;
6    else
7        return myFib(n - 1) + myFib(n - 2);
8}
9
10console.log(myFib(5));
11
12
13

1
2int n ; 
3double feb  = (1/Math.pow(5,0.5)) * (Math.pow((1+Math.pow(5,0.5))/2,n)) - (1/Math.pow(5,0.5))* (Math.pow((1-Math.pow(5,0.5))/2,n));