Do you know, what is Fibonacci numbers..?

These are numbers like 0, 1,1,2,3,5,8,13,21. . . . . . . . . .

How do you get these numbers . .?

First take numbers 0 and 1 as static. (Now numbers are 0, 1)

Last element is 1; its left element is 0, so add them, 0 + 1 = 1 (Now numbers is 0, 1, and 1)

Last element is 1, its left element is 1, so add them, 1 + 1 = 2 (Now numbers are: 0, 1, 1, and 2)

Last element is 2, its left element is 1, so add them, 2 + 1 = 3 (Now numbers are: 0, 1, 1, 2, and 3)

Last element is 3, its left element is 2, so add them, 3 + 2 = 5 (Now numbers are: 0, 1, 1, 2, 3, and 5)

Last element is 5, its left element is 3, so add them, 5 + 3 = 8 (Now numbers are: 0, 1, 1, 2, 3, 5, and 8)

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

Now let’s write a java program to print Fibonacci numbers up to a limit:

(Learn how to Compile and Run a Java file)

import java.io.*; class fibonacci { long f1=0; long f2=1; long f3=0; int n; void get() throws IOException { BufferedReader Br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter a limit : "); n=Integer.parseInt(Br.readLine()); } void display() { for(int i=0;i<n;i++) { if(f3 <= n) { System.out.println(f3); f1=f2; f2=f3; f3=f1+f2; } } } public static void main(String p[]) throws IOException { fibonacci f = new fibonacci(); f.get(); f.display(); } }

**Output**

Java program to print “N” Fibonacci numbers:

import java.io.*; class fibonacci { long f1=0; long f2=1; long f3=0; int n; void get() throws IOException { BufferedReader Br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("How many numbers : "); n=Integer.parseInt(Br.readLine()); } void display() { for(int i=0;i<n;i++) { System.out.println(f3); f1=f2; f2=f3; f3=f1+f2; } } public static void main(String p[]) throws IOException { fibonacci f = new fibonacci(); f.get(); f.display(); } }

**Output**

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