C Program For Printing Fibonacci Series.

This Post Contains A C Program For Printing Fibonacci Series With Correct Source Code & Output. This Program Is Written, Compiled & Executed At TurboC3.0 Compiler & Will Help You To Understand The Concept Of 'While-loop' From C Language. It Is A Well-Structured Program With Proper Comments Which Provides Step-By-Step Description Of Various Features Of The Language In A Simple
& Easy-To-Understand Way.

What Is A Fibonacci Series ?.

The Fibonacci Sequence Is The Series Of Numbers :

0,   1,   1,   2,   3,   5,   8,   13,   21,   34,   .....

The next number is found by adding up the two numbers before it.

• The 2 is found by adding the two numbers before it (1+1)
• Similarly, the 3 is found by adding the two numbers before it (1+2),
• And the 5 is (2+3), & so on.

Following Is The Simple & Easy To Understand Algorithm Of Fibonacci Series, Which Will Help You To Analyse The Source Code Of This Program.

Algorithm :

1.  Assign sum=0,  A=0,  B=1,  i=1.
2.  Get the no. of terms upto which u want to generate the Fibonacci no,  i.e.,  n.
3.  Add A and B to get the next Fibonacci number. 4. Assign the value of B to A i.e. A=B
5.  Assign the value of sum to B  i.e.  B = sum.
6.  Write the value of su to get next Fibonacci number in the series.
7.  Increment  i  with  1  i.e.  i = i + 1 and repeat step 3, 4, 5, 6 with the last value of i = n ( n is the no. of terms which u  want to generate Fibonacci no. series. )
8. Stop.

# Note : You Can Simply Copy-Paste The Following Program Or Code Into Compiler For Direct Result.


C Program For Printing A Fibonacci Series.

/* Declaration Of Header Files */
# include < stdio.h >
# include < conio.h >

/* Start Of Main Program */
void main()
{
  
   /* Declaration Of Variables */ 
   int a, b, c, value;
  
   clrscr();

   /* Accepting Input From User */
   printf ( " Enter Any Value : " );
   scanf ( " %d ", &value );

   /* Source Code For Computing Fibonacci Series */
   a  =  0; 
   b  =  1;
   c  =  0;
   printf ( " %d  \t  %d ", a, b );
   c  =  a  +  b;
   while ( c   <=   value )
   {
      printf ( " %d  \t ", c );
      a  =  b;
      b  =  c;
      c  =  a  +  b;
   }

   getch();

}
/* End Of Program */

Output :

Enter Any Value  :  55

0   1   1   2    3    5     8   13    21     34     55