**Tutorial Difficulty Level**

A “Fibonacci series” is a series of numbers in which each number ( *Fibonacci number* ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc. To print a Fibonacci series in C++, you have to ask the user to enter the total number of terms that he/she want to print fibonacci series upto the required number.

Now to print our Fibonacci series; first print the starting two number of the Fibonacci series and make a while loop to start printing the next number of the Fibonacci series. Use the variable say… a, b and c. Place b in a and c in b then place a+b in c to print the value of c to make and print Fibonacci series as shown here in the following program.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
#include<iostream.h> #include<conio.h> void main() { clrscr(); int a=0, b=1, c=0, limit; cout<<"Upto How many term ? "; cin>>limit; cout<<"Fabonacci Series : "<<a<<" "<<b<<" "; // first two term c=a+b; limit=limit-2; // decrease the limit by 2. since two numbers already printed while(limit) { cout<<c<<" "; a=b; b=c; c=a+b; limit--; } getch(); } |

When the above C++ program is compile and executed, it will produce the following result: