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