C Program to print Number Triangle

 

Like alphabet triangle, we can write the c program to print the number triangle. The number triangle can be printed in different ways.

Let's see the c example to print number triangle.

1. #include<stdio.h>    
2. #include<stdlib.h>  
3. int main(){  
4.   int i,j,k,l,n;    
5. system("cls");  
6. printf("enter the range=");    
7. scanf("%d",&n);    
8. for(i=1;i<=n;i++)    
9. {    
10. for(j=1;j<=n-i;j++)    
11. {    
12. printf(" ");    
13. }    
14. for(k=1;k<=i;k++)    
15. {    
16. printf("%d",k);    
17. }    
18. for(l=i-1;l>=1;l--)    
19. {    
20. printf("%d",l);    
21. }    
22. printf("\n");    
23. }    
24. return 0;  
25. }  

Output:

enter the range= 4
    1
   121
  12321
 1234321 

enter the range= 7
      1
     121
    12321
   1234321
  123454321
 12345654321
1234567654321