C program to display Fibonacci series

C program to display Fibonacci series

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

long int i, a1=0, a2=1, a3=1, n=1;

clrscr();

printf(“We are going to display a Fibonacci series.\nPlease input the number of terms you want to see in the Fibonacci series.\n”);

scanf(“%ld”, &n);

printf(“The Fibonacci series is displayed below:\n”);

if (n>=1)

printf(“%ld\,\t”,a1);

if (n>=2)

printf(“%ld\,\t”,a2);

if (n>2)

for (i=3;i<=n;i++)

{

 a3=a1+a2;

printf(“%ld\,\t”,a3);

a1=a2;

a2=a3;

}

getch();

}

Example of output

We are going to display a Fibonacci series.

Please input the number of terms you want to see in the Fibonacci series.

15

The Fibonacci series is displayed below:

0,         1,         1,         2,         3,         5,         8,         13,       21,       34,       55,       89,       144,           233,           377