Can someone give the java codes to make the following pattern?

Question

1 2 3 4 5
2 3 4 5
3 4 5
4 5
5

Answer 1

for(int i = 1; i <=5; i++){
for(int j = i; j<=5; j++{
System.out.print(j + " ");
}
System.out.print("\n");
}

Answer 2

And why do I need to do that?