JavaScript学习笔记 4-循环 Loops

学过C语言的人，对此应该熟悉，完全是一样的，一个简单的while循环例子：
简单的while循环
html
head
title简单的while循环例子/title
script language="javascript"
!--hide me

var password="tograce";
var answer;
while (answer!=password)
{
  answer=prompt("input the password(tograce)","");
}

//show me--
/script
/head
body
/body
/html
下面代码功能是一样的:
while loop
var a_line="";
 var loop = 0;
 while (loop width)
 {
     a_line = a_line + "x";
     loop=loop+1;
 }
for loop
var a_line="";
 for (var loop=0; loop width; loop++)
 {
     a_line = a_line + "x";
 }