Welcome to the Java Programming Forums

The professional, friendly Java community. 21,500 members and growing!

The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.

>> REGISTER NOW TO START POSTING

# Thread: Can you help me decipher what these two conditions mean in pseudocode?

1. ## Can you help me decipher what these two conditions mean in pseudocode?

CONDITION 1: while ( !(choice == 'Q' || choice == 'q') )
CONDITION 2: while ( choice != 'Q' || choice != 'q' )

2. ## Re: Can you help me decipher what these two conditions mean in pseudocode?

Condition 2 is always true. Can you see why this is so? One way to figure this out is to use Venn diagrams.

3. ## Re: Can you help me decipher what these two conditions mean in pseudocode?

It looks to me like despite looking a little different they get the same results. I just need some pseudocode of what this is

4. ## Re: Can you help me decipher what these two conditions mean in pseudocode?

They are most definitely not the same. To make them the same, you'd need to swap either one of the || for &&.

So ( !(choice == 'Q' || choice == 'q') ) is the same as ( choice != 'Q' && choice != 'q' )

and ( !(choice == 'Q' && choice == 'q') ) is the same as ( choice != 'Q' || choice != 'q' )

Again, use Venn diagrams to see that this is so.

5. ## Re: Can you help me decipher what these two conditions mean in pseudocode?

I'm a real novice. I really don't understand the venn diagram link you added.

6. ## Re: Can you help me decipher what these two conditions mean in pseudocode?

Please click on the image and take a look at this:

Venn1a.jpg