01 #include <stdio.h>
02 
03  int main()
04  {
05   int n,i,c,a = 1; 
06   printf("Enter the number of rows of Floyd's triangle to print:n");
07   scanf("%d",&n); 
08   
09   for (i = 1; i <= n; i++)
10    {   
11     for (c = 1; c <= i; c++)
12     {    
13      printf("%d ",a); 
14      a++;
15     }
16     printf("n");
17    }
18    
19   return 0; 
20  }

 OUTPUT :
 
 Enter the number of rows of Floyd's triangle to print:
 4
 
 1
 2 3
 4 5 6
 7 8 9 10