Fibonaaci for 20 elements

#include <stdio.h>

int main()
{
    int a[20];
    a[0] = 0;
    a[1] = 1;
    
    for(int i=2;i<20;i++) {
        a[i] = a[i-1]+a[i-2];
    }
    
    printf("Fibonacci Series \n");
    
    for(int i=0;i<20;i++) {
        printf("%d,",a[i]);    
    }
}