Number Pattern 3 by while loop,

Code Box by while loop
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/*program to print number pattern  by while loop

  1
  22
  333
  4444
  55555

*/

class npat3w
{
public static void main(String a[])
{
int n,i,j;
i=1;
n=Integer.parseInt(a[0]);

while(i<=n)
{j=1;
        while(j<=i)
        {
        System.out.print(i);
        j++;
}

System.out.print("\n");
i++;
}
}
}