Java Program to print the following pattern

Java Program to print the following pattern:

        1
      21
    321
  4321
54321

public class aa
{
	public static void main(String args[])
	{
		int  a,b,c=0;
		for (a=1;a<=5;a++)
		{
			for (b=5;b>=a;b--)
			{
				System.out.print(" ");
			}
			for(c=a;c>=1;c--)
			{
				System.out.print(c);
			}
			System.out.println();
		}
	}
}

Output: