請問如何產生三角形的樣子

要如何產生出像這樣的樣子
[code="java"]

---

---

* * *
  * *
    *

[/code]

[code="java"]

---

---

---

• *

for(x=1;x<=5;x++){

for(y=x;y<=5;y++){

document.write(y);

}

document.write("
");
}

[/code]

[quote]

for(var x=1;x<=5;x++){ for(var y=1;y<=x;y++){ document.write("&nbsp;"); } for(var y=5;y>=x;y--){ document.write("*"); } document.write("<br />"); }

[/quote]

好多种变形的！ 呵呵 :wink:

[quote]

for(var x=1;x<=5;x++){ for(var y=x;y<=5;y++){ document.write("&nbsp;"); } for(var y=1;y<=x;y++){ document.write("*"); } document.write("<br />"); }

[/quote]