Program for Fibonacci numbers
//Fibonacci Series using Recursion class fibonacci { static int fib(int n) { if (n <= 1) return n; return fib(n-1) + fib(n-2); } public static void main (String args[]) { int n = 9; System.out.println(fib(n)); } } /* This code is contributed by Rajat Mishra */
// Fibonacci Series using Dynamic Programming class fibonacci { static int fib(int n) { /* Declare an array to store Fibonacci numbers. */ int f[] = new int[n+1]; int i; /* 0th and 1st number of the series are 0 and 1*/ f[0] = 0; f[1] = 1; for (i = 2; i <= n; i++) { /* Add the previous 2 numbers in the series and store it */ f[i] = f[i-1] + f[i-2]; } return f[n]; } public static void main (String args[]) { int n = 9; System.out.println(fib(n)); } } /* This code is contributed by Rajat Mishra */
// Java program for Fibonacci Series using Space // Optimized Method class fibonacci { static int fib(int n) { int a = 0, b = 1, c; if (n == 0) return a; for (int i = 2; i <= n; i++) { c = a + b; a = b; b = c; } return b; } public static void main (String args[]) { int n = 9; System.out.println(fib(n)); } } // This code is contributed by Mihir Joshi
http://www.geeksforgeeks.org/program-for-nth-fibonacci-number/
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