Fibonacci Series Program In C

Finding that a given number is even or odd, is a classic program. We shall learn the use of conditional statement if-else in C.

Algorithm

Algorithm of this program is very easy −

START
      
   Step 1 → Take integer variable A
          
   Step 2 → Assign value to the variable

   Step 3 → Perform A modulo 2 and check result if output is 0
   
   Step 4 → If true print A is even
   
   Step 5 → If false print A is odd

STOP

Flow Diagram

We can draw a flow diagram for this program as given below −

Pseudocode

procedure even_odd()
   
   IF (number modulo 2) equals to 0
      PRINT number is even
   ELSE
      PRINT number is odd
   END IF

end procedure

Implementation

Implementation of this algorithm is given below −

#include <stdio.h>

int main()
{
	int a,b,c,i,n;
	
	printf("Enter n value to generate fibonacci series : ");
	scanf("%d",&n);
	a=b=1;
	printf("%d %d ",a,b);
	
	for(i=1;i<=n-2;i++) {
		c=a+b;
		printf("%d ",c);
		a=b;
		b=c;
	}
return 0;
}

Output

Output of the program should be −

24 is even
31 is odd