Java program print "1 to 4" in that number count with number in triangle.

class t5
{
public static void main (String a[])
{
int i,j;
for (i=1;i<=4;i++)
{
for(j=1;j<=i;j++)
{
System.out.print (i);
}
System.out.println (" ");
}
}
}