Fibonacci series

Program:

 #include<stdio.h> 
int main() 
{ 
int n1=0,n2=1,n3,i,num; 
  printf("Enter No. of elements: \n"); 
  scanf("%d",&num); 
  printf("%d %d",n1,n2); 
  for(i=2;i<num;i++) 
  { 
  n3=n1+n2; 
  printf(" %d ",n3); 
  n1=n2; 
  n2=n3; 
  }
return 0;
}

Output:

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