Recursion Using - C
  
 Source Code
  

  
#include<stdio.h>

int fibonacci(int n);

void main() { 
	int n, i; 
	printf("Enter the number of terms:  "); 
	scanf("%d",&n); 
	
	printf("\nFIBONACCI SERIES: \n");
		for(i=0; i < n; i++) { 
			printf("%d   ",fibonacci(i));
		}
}
 
int fibonacci(int n) { 
	if(n==0) 
		return 0; 
	else if(n==1) 
		return 1; 
	else 
		return (fibonacci(n-1)+fibonacci(n-2));
} 

  

Enter the number of terms:  7

FIBONACCI SERIES:
0     1     1     2     3     5     8

  
Iteration Using - C
  
 Source Code
  

  
#include<stdio.h>

void fibonacci(int n);

void main() { 
	int n; 
	printf("Enter the number of terms:  "); 
	scanf("%d",&n); 
	fibonacci(n);
}
 
void fibonacci(int n) { 
	int num1=0, num2=1, num3, i;
	if(n==0 || n==1)
		printf("%d  ",num1);
	else {
		printf("%d   %d   ",num1,num2);
		for(i=2; i < n; i++) {
			num3 =  num1 + num2;
			printf("%d   ",num3);
			num1 = num2;
			num2 = num3;
		}	
	}
	
} 
  

Enter the number of terms:  6

FIBONACCI SERIES:
0     1     1     2     3     5

        
Rescursion Using - C++
        
 Source Code
        

        
#include<iostream>
using namespace std;

int fibonacci(int n);

int main() { 
	int n; 
	cout<< "Enter the number of terms:  "; 
	cin>> n;
	
	cout<< "\nFIBONACCI SERIES: "<< endl;
		for(int i=0; i < n; i++) { 
			cout<< fibonacci(i)<< "   ";
		}
}
 
int fibonacci(int n) { 
	if(n==0) 
		return 0; 
	else if(n==1) 
		return 1; 
	else 
		return (fibonacci(n-1)+fibonacci(n-2));
} 
         
      

Enter the number of terms:  10

FIBONACCI SERIES:
0     1     1     2     3     5     8     13     21     34

  
Iteration Using - C++
  
 Source Code
  

  
#include<iostream>
using namespace std;
      
void fibonacci(int n);
  
int main() { 
    int n; 
    cout<< "Enter the number of terms:  "; 
    cin>> n;
    cout<< "\nFIBONACCI SERIES:"<< endl;
    fibonacci(n);
      
  return 0;
  }
       
void fibonacci(int n) { 
int num1=0, num2=1, num3;

if(n==0 || n==1)
    cout<< num1<< "   ";
else {
    cout<< num1<< "   "<< num2<< "   ";
      for(int i=2; i < n; i++){
          num3 =  num1 + num2;
          cout<< num3<<"   ";
          num1 = num2;
          num2 = num3;
      }	
    }
}   

Enter the number of terms:  1

FIBONACCI SERIES:
0