Java help needed.

[Chaos 1,427]

I need to make a loop pattern program with the output as

  *

 * *

* * *

 * *

  *

Too much space in between lines sry ;_;

But I'm pretty sure I conveyed this well. So help? 

[Shawnic 2,977]

Hmm... that shouldn't be too difficult (you want just those *s, right?) 

 

[Chaos 1,427]

38 minutes ago, Master Flap said:

Hmm... that shouldn't be too difficult (you want just those *s, right?) 

 

Using a loop statement. Need to increment the number of asterisks and then decrement it to 1.

[Echo 746]

Use a for loop within a for loop. The inner loop prints the number of asterisks in the row, then the outer loop moves everything to the next line. Run that double loop for the intended length of the pattern (number of lines it runs), divided by two. Then have another double loop with does the same thing but just counts down asterisks instead of up.

[Chaos 1,427]

10 minutes ago, FOX545 said:

Use a for loop within a for loop. The inner loop prints the number of asterisks in the row, then the outer loop moves everything to the next line. Run that double loop for the intended length of the pattern (number of lines it runs), divided by two. Then have another double loop with does the same thing but just counts down asterisks instead of up.

Yeah that was kinda obvious, but I'm just not getting it right. I've been trying over and over again and just don't know where I'm going wrong. 

[Echo 746]

5 hours ago, Chaos said:

Yeah that was kinda obvious, but I'm just not getting it right. I've been trying over and over again and just don't know where I'm going wrong. 

Try using the debugger if your IDE has one

 

If not you could just copy your code here and we could try to help

Edited February 11, 2016 by FOX545

[Chaos 1,427]

42 minutes ago, FOX545 said:

Try using the debugger if your IDE has one

 

If not you could just copy your code here and we could try to help

I'll do that in a while. 

[Conan Edogawa 837]

23 hours ago, Chaos said:

I'll do that in a while. 

So we can examine what you might be expressing.

[Shawnic 2,977]

On 2/11/2016 at 8:02 AM, Chaos said:

I'll do that in a while. 

No, I think for loops would suffice. 

[Chaos 1,427]

Ok nvm I got that. Someone explain Binary search to me instead plox

[Shawnic 2,977]

2 minutes ago, Chaos said:

Ok nvm I got that. Someone explain Binary search to me instead plox

Binary search is a common but very powerful algorithm used to increase the efficiency of your programs. To have an idea of how binary search works, think of it in this way: Suppose you were asked to think of a number between 0-100 and I had to guess what number you had. If I used the binary method, I'd guess 50. Then you'd tell me whether I'm right or if I'm guessing too high or too low. If I'm right, I'll stop and say 50 is the right answer. If I'm too high, I'll limit my guesses from 0 to 49. If I'm too low, it'll reduce to 51-100. You keep going till you get the right answer. You can see that this reduces the number of guesses drastically. 

[Chaos 1,427]

3 minutes ago, Master Flap said:

Binary search is a common but very powerful algorithm used to increase the efficiency of your programs. To have an idea of how binary search works, think of it in this way: Suppose you were asked to think of a number between 0-100 and I had to guess what number you had. If I used the binary method, I'd guess 50. Then you'd tell me whether I'm right or if I'm guessing too high or too low. If I'm right, I'll stop and say 50 is the right answer. If I'm too high, I'll limit my guesses from 0 to 49. If I'm too low, it'll reduce to 51-100. You keep going till you get the right answer. You can see that this reduces the number of guesses drastically. 

Any programs to serve as examples?

[Shawnic 2,977]

1 minute ago, Chaos said:

Any programs to serve as examples?

Tons. Many programs use it. Using a slightly modified version of it, there are programs that find square roots of numbers.

Other examples are of course, guessing games. 

[Jade Maveric 26]

Try the binary search tutorial on KhanAcademy.

And can someone please clarify, are links allowed?

[test 367]

48 minutes ago, Jade Maveric said:

Try the binary search tutorial on KhanAcademy.

And can someone please clarify, are links allowed?

They are, unless they conflict with the rules (there is no longer an external link rule). The only rule that can by bypassed somehow is swearing, which can be done in PM if both parties are comfortable with it and you could post a video or link with swearing in it, making sure to warn the viewers.

Or at least that is what I believe.

Edited February 14, 2016 by Chocozeus
Italicizing

[Agent P 2,480]

I did this exact pattern last November oh

[Agent P 2,480]

On 2/12/2016 at 0:55 PM, Master Flap said:

Tons. Many programs use it. Using a slightly modified version of it, there are programs that find square roots of numbers.

Other examples are of course, guessing games. 

can you send me a link of those programs? That sounds interesting.

[Shawnic 2,977]

1 hour ago, Agent P said:

can you send me a link of those programs? That sounds interesting.

 I'll search for it. Though I've only seen it on a friend's computer once.  

Wow, wasn't hard to find it. https://www.geeksforgeeks.org/square-root-of-an-integer/

I haven't checked it thoroughly but that's what I was talking about. 

[Agent P 2,480]

18 hours ago, Master Flap said:

 I'll search for it. Though I've only seen it on a friend's computer once.  

Wow, wasn't hard to find it. https://www.geeksforgeeks.org/square-root-of-an-integer/

I haven't checked it thoroughly but that's what I was talking about. 

Ohhh it's like a Brute Force Method of sorts.