VERY basic question - if loop

[kobi1988]

Hello everyone,

I started studying Java today and couldn't understand why this code would give the result bellow it:

INPUT:

public class SimpleLoop {
 
        public static void main(String[] args) {                
                for(int i=0; i<20; i++) {
                        for(int j=0; j<i; j++) {
                                System.out.print(" ");
                        }
                        System.out.println("*");
                }
        }
}

OUTPUT:

*
(1 space) *
(2 spaces) *
(3 spaces) *
(4) *
(5) *
and so on...


there is no instruction for how many (' ') (space) to type before the ('*').
I mean, shouldn't it be like this?

*
(1 space) *
(1 space)*
(1 space) *
(1 space)*
and so on...?


In the first run - no space, but from the second - there is space, but only one.... isn't it?



Thanks for helping...
Kobi.

[helloworld922]

Take a look at the nested loop. It's printing out the number of spaces depending on which line you're on.

So the first line has no spaces, the second line has 1 space, and so on and so forth.

[kobi1988]

But isn't the 'j' symbolize the number of repetitions and not the number of the spaces...?

if i=4 and j=3 isn't it should print only one space as i ordered it?

[kobi1988]

ohhhhhh!!!!
i got it now...!

the nested "if" keep running before it goes another round of the "main if"...


thanks!