## 9.03.2011

### 14. 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
21
321
4321
54321

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

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

1
21
321
4321
54321

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

1. This trick is good but it can be solved by or simply so that a new program begineer can understand easily

1. @Ankit,
Share your knowledge, so beginner and expert improve his/her programming skills.

2. Wrong program ............Outer for loop should b ..................

for(r=1; num<=r; r++)

1. @Akash Singh,

In above program, if we replace outer for loop condition as
for(r=1; num<=r; r++)
and num=5
then when first time loop checking the condition as
5<=1 ( i.e. num<=r )
here condition false, so loop never executed or run, hence output of above program is nothing.