Fibonacci's Series

#include <stdio.h>
int main()
{
    int i, n, F1 = 0, F2 = 1, Fn;

    printf("Enter the number of terms: ");
    scanf("%d", &n);

    printf("Fibonacci Series: ");

    for (i = 1; i <= n; ++i)
    {
        printf("%d ", F1);
        Fn= F1 + F2;
        F1 = F2;
        F2 = Fn;
    }
    return 0;
}