How to print 9,99,8,89,7,79....

 / common way to write 

int a=9,n=10 ;  // n value you can take anything

for(int i=1;i<=n;i++)

{

if(i%2==1)

{

System.out.print(a);

}

else

{

System.out..print(a*10+9);

a--;

}}