嵌套循环是计算机术语。
程序编辑本段回目录
var height = prompt("How high do you
want the grid? (1-10 is good)","10");
var width= prompt("How wide do you want
the grid? (1-10 is good)","10");
var a_line;
var new_window =
window.open("/webmonkey/98/04/files1a
/grid.html","looper","width=400,height=400");
new_window.document.writeln("<h1>A Grid</h1>");
for (height_loop = 0; height_loop
< height; height_loop++)
{
a_line = "";
for (width_loop = 0;
width_loop < width; width_loop++)
{
a_line+="x";
}
new_window.document.writeln
(a_line + "<br>");
}
在请求高及宽后,打开一新窗口,并为它写一个头,进入for循环。第一个for循环设a_line=“”。试一下不用该行做一下本例,看看会发生什么。在初始化a_line后,程序进入下一个for循环,当宽达到所需值后,建立X`S行并将它显现在新窗口中。这些将发生height次。