diamond pattern

#include<stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=0; i<n; i++)
    {
        for(j=0; j<2*n-1; j++)
        {

            if(j<n&&j<n-i-1)
                printf("  ");
            else if(j>=n&&j>=n+i)
                printf("  ");
            else
                printf("* ");
        }

        printf("\n");

    }
    for(i=0; i<n-1; i++)
    {
        for(j=0; j<2*n-1; j++)
        {

            if(j<n&&j<=i)
                printf("  ");
            else if(j>=n&&j>=2*n-i-2)
                printf("  ");
            else
                printf("* ");


        }
        printf("\n");
    }
}