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New to java, how to do a certain loop

2 replies on 1 page. Most recent reply: Sep 22, 2005 11:40 PM by Kondwani Mkandawire

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Jon

Posts: 1
Nickname: clarjon1
Registered: Sep, 2005

New to java, how to do a certain loop

Posted: Sep 22, 2005 10:18 AM

OK, I am new to Java, and I used to use Turing. In turing, there is this one loop where it would loop until a variable number was met or passed. Anything like that in Java? Thanks!

Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: New to java, how to do a certain loop

Posted: Sep 22, 2005 11:22 PM

1. Checks the condition before the loop (makes it possible that the loop will never be executed) Needs external variables for the ondition.

    while ([condition]) {
        //do something very important
    }

2. Checks the condition after the loop (the loop will be executed at leas once). Needs external variables for the ondition.

    {
        //do something very important
    } while ([condition]);

3. Classic for-to statement. Allows to declare a condition variable only for this loop, not visible outside the loop

    for ([declare and initialize variable]; [condition]; [operation after each loop]) {
        //do something very important
    }
//for example:
    for (int i = 0; i < 50; i++) {
        //do something very important
    }

[condition] : means, that you can evaluate your variable here, for example: i < 50
As long this evaluation returns true, the loop will be executed.

Kondwani Mkandawire

Posts: 530
Nickname: spike
Registered: Aug, 2004

Re: New to java, how to do a certain loop

Posted: Sep 22, 2005 11:40 PM

> OK, I am new to Java, and I used to use Turing. In
> turing, there is this one loop where it would loop until a
> variable number was met or passed. Anything like that in
> Java? Thanks!

If I remember my one of my CS courses correctly,
anything done at the hardware level, can be simulted
at the software level. So anything a Turing machine
can (theoretically) be proven to do, would have its
Java equivalent

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