C Program to display Inverted half-pyramid using numbers

Problem

Write a program in C to print Inverted half-pyramid using numbers as shown below.The program should take the number of rows as input.

1 2 3 4
1 2 3
1 2
1

How to create and display Inverted half-pyramid pattern in C using numbers ?

#include <stdio.h>
int main()
{
    int index1, index2, n;
    printf("Abundantcode.com Coding samples\n");
    printf("Enter number of rows: ");
    scanf("%d",&n);

    for(index1=n; index1>=1; --index1)
    {
        for(index2=1; index2<=index1; ++index2)
        {
            printf("%d ",index2);
        }
        printf("\n");
    }
    return 0;
}

Output

Abundantcode.com Coding samples

Enter number of rows: 4

1 2 3 4

1 2 3         
1 2