#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,k=1,n;
clrscr();
printf("\nEnter the number of
rows:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf("
%d",k);
k++;
}
printf("\n");
}
getch();
}
/**************OUTPUT****************
Enter the number of rows:4
1
2 3
4 5
6
7 8
9 10 */