# 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
```