number_serial_pyramid

#include<stdio.h>
int main ()
{
  int i, row=6, j, number=1;
  printf("this is step by step create to pyramid\n\n");

  for(i=1; i<=row; i++)
  {
    for(j=1; j<=i; ++j)
      {
      printf("%d",number);
    ++number;
    }
    printf("\n");
  }

  return 0;
}