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Fibonacci Series in C || C Language Tutorial by Fresher Side

Fibonacci Series in C: In case of fibonacci series, next number is the sum of previous two numbers for example 0, 1, 1, 2, 3, 5, 8, 13, 21 etc. The first two numbers of fibonacci series are 0 and 1.

There are two ways to write the fibonacci series program:

Fibonacci Series without recursion

Source Code -

#include<stdio.h>   
int main()    
{    
 int n1=0,n2=1,n3,i,number;    
 printf("Enter the number of elements:");    
 scanf("%d",&number);    
 printf("\n%d %d",n1,n2);//printing 0 and 1   
 for(i=2;i<number;++i)//loop starts from 2 because 0 and 1 are already printed   
 {    
  n3=n1+n2;    
  printf(" %d",n3);    
  n1=n2;    
  n2=n3;    
 }  
 return 0;  
 }    

Output -


Enter the number of elements:15 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377


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