How can I print the Fibonacci series using only 2 variables?

Question

java

Answer 1

normaly i dont like it to just write the code :D
but here it is:

public class Program
{
public static long fib(int n) {
if (n == 0) {
return 0;
} else if (n == 1) {
return 1;
} else {
return fib(n-1) + fib(n-2);
}
}

public static void main(String[] args){
for(int i=0; i < 25; i++) {
System.out.println(i + ": " + fib(i));
}
}
}

Answer 2

public class Program
{
public static void main(String[] args) {
int number = 0;
int add = 0;

while (true) {
if (add == 0) {

System.out.println(number);
add++;
}
else {
System.out.println(add);
System.out.println(number);
}

add += number;
number += add;
}
}
}

Answer 3

https://jsfiddle.net/jayanthns/gx8kg3us/

// javascript //
var n = prompt("enter value of length");
var a = 0, b = 1;
if(n > 1) {
document.write(a+"<br>");
n--;
}
if(n > 1) {
document.write(b+"<br>");
n--;
}
while(n>0) {
document.write((a+b)+"<br>");
b = a+b;
a = b - a;
n--;
}

// Java//
int n = 10;
int a = 0, b = 1;
System.out.println(a);
System.out.println(b);
n = n-2;
while(n > 0) {
System.out.println(a+b);
b = a + b;
a = b - a;
n--;
}