18. Design numbers tringle pyramid

Q. Write a program to generate a following numbers triangle:(Where user entered number through keyboard, for example if num=5)

1	2	3	4	5	4	3	2	1
	1	2	3	4	3	2	1
		1	2	3	2	1
			1	2	1
				1

Ans.

/*c program for number triangle pyramid*/

#include<stdio.h>

#include<conio.h>

int main()

{

 int num,r=1,c,sp,x;

 printf("Enter loop repeat number(rows):");

 scanf("%d",&num);
 for(; num>=1; num--,r++)

 {

   for(sp=r; sp>1; sp--)

      printf(" ");

   for(c=1; c<=num; c++)

      printf("%d",c);

   for(x=num-1; x>=1; x--)

      printf("%d",x);

   printf("\n");

 }
 getch();

 return 0;

}
/****************OUTPUT************
Enter loop repeat number(rows): 5

1	2	3	4	5	4	3	2	1
	1	2	3	4	3	2	1
		1	2	3	2	1
			1	2	1
				1

************************************/