Q. Write a program to print fibonacci series.

Solution :- This program is about giving a length N and the task is to print the Fibonacci series upto n terms.

Fibonacci Sequence :- The Fibonacci sequence is a sequence consisting of a series of numbers and each number is the sum of the previous two numbers. For Example :- 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, …….

Fibonacci Series Algorithm

START
  Step 1->Declare variables i, a, b, nextTerm
  Step 2->Initialize the variables, a=0, b=1, and nextTerm = 0
  Step 3->Enter the number of terms of Fibonacci series to be printed
  Step 4->Repeat below steps n times
   -> print the value of a
   -> nextTerm = a + b
   -> a = b
   -> b = nextTerm
   -> increase value of i each time by 1
STOP

Fibonacci Series Program

C++

Java

Python

PHP

#include<stdio.h> 
int fib(int n) 
{ 
	int a, b, nextTerm, i;
	a = 0;
	b = 1;
	for (i = 1; i <= n; ++i) {
        printf("%d ", a);
        nextTerm = a + b;
        a = b;
        b = nextTerm;
    }
} 
int main () 
{ 
int n = 9; 
fib(n);
return 0; 
}

#include<bits/stdc++.h> 
using namespace std; 
int fib(int n) 
{ 
	int a, b, nextTerm, i;
	a = 0;
	b = 1;
	for (i = 1; i <= n; ++i) {
        printf("%d ", a);
        nextTerm = a + b;
        a = b;
        b = nextTerm;
    } 
} 
int main () 
{ 
int n = 9; 
fib(n);
return 0; 
}

public class Main
{
	public static void main(String[] args) {
		int a, b, nextTerm, i, n =9;
    	a = 0;
    	b = 1;
    	for (i = 1; i <= n; ++i) {
            System.out.print(a);
            System.out.print(" "); 
            nextTerm = a + b;
            a = b;
            b = nextTerm;
        }  
	}
}

n = 9
a = 0
b = 1
nextTerm = 0
for i in range(n):
	print(nextTerm, end = " ")
	a = b
	b = nextTerm
	nextTerm = a + b

using System;  
public class Demo{  
   public static void Main(string[] args){  
      int a = 0, b = 1, nextTerm, i, n = 9;
      for(i=0 ;i < n; ++i){    
         Console.Write(a+" ");
         nextTerm = a + b;   
         a = b;    
         b = nextTerm;    
      }    
   }  
}

function Fibonacci($n){
  
    $a = 0;
    $b = 1;
  
    $counter = 0;
    while ($counter < $n){
        echo ' '.$a;
        $nextTerm = $b + $a;
        $a = $b;
        $b = $nextTerm;
        $counter = $counter + 1;
    }
}
  
$n = 9;
Fibonacci($n);

#include<stdio.h> 
int fib(int n) 
{ 
	int a, b, nextTerm, i;
	a = 0;
	b = 1;
	for (i = 1; i <= n; ++i) {
        printf("%d ", a);
        nextTerm = a + b;
        a = b;
        b = nextTerm;
    }
} 
int main () 
{ 
int n = 9; 
fib(n);
return 0; 
}

Output

0 1 1 2 3 5 8 13 21

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