JAVA SCRIPT
Sometimes you want to do the same thing more than once. Let's say, for
example, that you wanted to get a password from somebody and you wanted to
keep asking until they gave you the right password. If you just wanted to
give them two tries, you could do something like this:
var the_password = "pass the wrench";
var answer = prompt("What's the woyd?","");
if (answer != the_password) {
answer = prompt("What's the woyd?","");
if (answer != the_password) {
document.write("You lose!<p>");
} else {
document.write("That's right!<p>");
}
} else {
document.write("That's right!<p>");
}
Unfortunately, this sort of thing won't work if you just want to keep
asking until they get it right. And it's pretty ugly already - imagine if
you wanted to ask four times instead of just two. You'd have four levels
of if-then clauses, which is never a good thing.
The best way to do similar things more than once is to use a loop.
In this case, you can use a loop to keep asking for passwords until the
person gives up. Here's an example of a while loop in action. The password
is: pass the wrench.
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