C Program to print Number Triangle

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

#include<stdio.h>    
#include<stdlib.h>  
int main(){  
  int i,j,k,l,n;    
system("cls");  
printf("enter the range=");    
scanf("%d",&n);    
for(i=1;i<=n;i++)    
{    
for(j=1;j<=n-i;j++)    
{    
printf(" ");    
}    
for(k=1;k<=i;k++)    
{    
printf("%d",k);    
}    
for(l=i-1;l>=1;l--)    
{    
printf("%d",l);    
}    
printf("\n");    
}    
return 0;  
}  

Output:

enter the range= 4
   1
  121
 12321
1234321 

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