Number Pyramid Algorithm in C

Number Pyramid Algorithm in Data Structure example in C programming :

#include <stdio.h>

main() {

  int n, c, d, num = 1, space;

    printf("Enter the number of rows ");
  scanf("%d", &n);

  space = n - 1;

  for (d = 1; d <= n; d++) {

    num = d;

    for (c = 1; c <= space; c++)
      printf(" ");

    space--;

    for (c = 1; c <= d; c++) {

      printf("%d", num);
      num++;

    }

    num--;
    num--;

    for (c = 1; c < d; c++) {

      printf("%d", num);
      num--;

    }

    printf("\n");

  }

  return 0;
}

OUTPUT

Enter the number of rows 5
    1
   232
  34543
 4567654
567898765