Array fill I

#include<stdio.h>
int main()
{
    int arr[10],i,num;
    scanf("%d",&num);
    printf("N[0] = %d\n",num);
    for(i=1;i<10;i++)
    {
        printf("N[%d] = %d\n",i,(num=num*2));
    }
    return 0;
}