问题描述
嗨！所以我一直在尝试使用嵌套 for或while循环创建下面的模式，但是我的代码似乎没有提出我需要的东西。事实上，它什么都没显示！
模式：
*
**
***
****
*****
******
***** **
******
*****
****
* **
**
*
以下是我一直在尝试的代码。
我尝试过：
for（var count = 1; count< ; 8; count + = 1;）{
document.write（count +*
）;
for（var count2 = 1; count< 8; count - = 1;）{
document.write（count +*
）;
}
}
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 + "*
");
}
}
推荐答案
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>");
}
这篇关于如何制作for或while嵌套循环patern的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！