How to make a for or while nested loop patern

Question

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Hi! So i have been trying to create the pattern below using nested for or while loops, however my code does not seem to put out what I need. In fact, It displays nothing!

Pattern:
*
**
***
****
*****
******
*******
******
*****
****
***
**
*

Below is the code I have been trying out.

What I have tried:

for (var count = 1; count < 8; count+= 1;) {
document.write(count + "*
");

for (var count2 = 1; count < 8; count -= 1;) {
document.write(count + "*
");
}
}

Posted 5-Jul-18 4:40am

!DOCTYPE html

Updated 5-Jul-18 5:45am

Patrice T

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Comments

F-ES Sitecore 5-Jul-18 10:51am

The syntax of your "for" loop is wrong, consult the documentation on how to do a javascript for loop, or google it. You really need to improve your basic understanding of javascript before you attempt any actual work. We can't teach you a whole language from scratch via forum posts.

Patrice T 5-Jul-18 11:02am

post a code that we can run.

Patrice T 5-Jul-18 11:11am

you should reread careffuly your code, it is plain wrong.

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User 7429338 · Answer 1 · 2018-07-05T05:45:00

You could do something like this:

for (var count = 1; count <= 7; count++)
{
    for(var i = 0;i<count;i++)
    {
        document.write("*");
    }
    document.write("<br>");
}

for (var count = 6; count >=1 ; count--)
{
    for(var i = 0;i<count;i++)
    {
        document.write("*");
    }
    document.write("<br>");
}