Number structure

Q. Write a C program to print the following number triangle or number structure:


           1
         1 2 3
       1 2 3 4 5
     1 2 3 4 5 6 7
   1 2 3 4 5 6 7 8 9


Ans.


/*c program for above number triangle codes*/
#include<stdio.h>
#include<conio.h>
int main()
{
 int r,c,sp,num;
 printf("Enter loop repeat number(rows): ");
 scanf("%d", &num);
 for(r=1; r<=num; r++)
 {
  for(sp=1; sp<=num-r; sp++)
     printf("  ");   //it is 2 blank space
  for(c=1; c<=2*r-1; c++)
     printf(" %d",c);
  printf("\n");
 }
 getch();
 return 0;
}


/**************Output**************/

Screen shot for number triangle C program