Print Triangle As Numbers

Enter the no of rows : 4                                                                                                                       

1                                                                                                                                              

2 3                                                                                                                                            

4 5 6                                                                                                                                          

7 8 9 10    

#include <stdio.h>

int main()
{
    int n, i, j, a=1;
    
    printf("\nEnter the no of rows : ");
    scanf("%d", &n);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            printf("%d ",a);
            a++;
        }
        printf("\n");
    }

    return 0;
}