Number Triangle

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

     1
    21
   321
  4321
 54321

Ans.

/*c program for number pyramid*/
#include<stdio.h>
int main()
{

 int num,r,c,sp;
 printf("Enter no of rows : ");
 scanf("%d", &num);
 for(r=1; r<=num; r++)
 {
  for(sp=num-r; sp>=1; sp--)
     printf(" ");
  for(c=r; c>=1; c--)
     printf("%d",c);
  printf("\n");
 }
 getch();
 return 0;
}

The output of above program would be:

Figure : Screen shot for number triangle C program