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