Printing numbers in pyramid form.

Question

I want to print out this with Java and don't want to use array
0
012
0123
01234
012345

Answer 1

It goes something like this:

https://code.sololearn.com/WSSA1Ep4116a/?ref=app

(run the code)

PS. Please don't judge that code, I'm not a web/js type of guy.

Answer 2

// With one loop

int height = 5, i = 0;
String s = "";
do
System.out.println(s += i);
while (i++ < height);

Answer 3

This doesn't need arrays. What you need is two nested loops: outer one goes from zero to height, inner one — from zero to current value of the outer loop counter. Inside the inner loop print the inner loop counter, just after the inner loop print newline.

Answer 4

Your inner loop counter increment isn't right. Instead of i=j there should be i++. Here's complete snippet, you almost got it right anyway:

int height = 5;

for (int i = 0; i < height; i++) {
for (int j = 0; j < i; j++) {
print(j);
}
print("\n");
}

Answer 5

Generally, texts are printed horizontally, to print a text in a new line, you have to print a new line char (‘\n’), then print your text.

Answer 6

Awesome, thanks. I believe you did great

Answer 7

I'll try, but a bit later. For now, I'd like to point out, that I've changed it, just after posting it here. It was a bit incorrect, so your copy is outdated.

Anyway, that code is a really badly structured mess. You shouldn't learn from it, as it's a bad example. I did it in js only because it's the only way to show anything animated here. Also, the worse is a code, the harder it is to read/understand/explain. And that one is bad.

Answer 8

Commented as requested. Hope it helps. Ask if anything specific isn't clear.

PS. Set delay to 50 and enjoy the party!

Answer 9

I can't edit your codes, so I commented mine. And also, as I've said, your copy is a bit outdated. It shows for loops execution wrong. So throw it away and get a fresh copy.

Answer 10

Thanks but I don't seem to understand the inner loop method. Here's what I could jot down from your explanation

for (j=0;j<7;j++) {
for (i=0; i<j; i=j)
Is this what you mean??

Answer 11

Thanks

Answer 12

Just noticed that I've made a little error that makes the code produce output like this:

------

0
01
012
0123
------

which is a bit ugly, as it prints newline before the actual output, and also the height isn't correct. See if you can fix it to produce output like this:

------
0
01
012
0123
01234
012345
------

Hint: That would be a small change in both loops.

Answer 13

My question is this, when printing out these codes I mean both codes, does Java print then horizontally or vertically, still trying to wrap my heads as to how these codes work.

Answer 14

Please can you comment the working code you sent to me, I am a js guy, beginner tho. I want to understand the code.

https://code.sololearn.com/WeQ3Wn11q2QO/?ref=app

Answer 15

You commented my version or your version?