print the deign of right anle triangle of numbers

Below is my code:

class design
{
public static void main(String s[])
{
int a,b;
for(a=1;a<=5;a++)
{
for(b=1;b<=a;b++)
{
System.out.print(""+b);
}
System.out.println("");
}
}
}

       Step 1:  After writing this in notepad save the file with the name followed by (.java) for eg.i saved it with fibonacci.java

      Step 2 : Open command prompt 

      Step 3 : Write javac fibonacci.java - Press Enter for compilation

    Step 4 : Write java fibonacci for execution

 Output: