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Bijoux Tisses : Perles a l'Aiguille by Marie Geraud

By Marie Geraud

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Replacing == with = in an if statement is a very tricky mistake, and it can lead to unpredictable program errors that may not be so easy to find. "); counter++; } The keyword continue allows the code to skip some lines and return back to the beginning of the loop. "); } There is yet another flavor of the while loop that starts with the word do, for example: do { // Your code goes here } while (counter< totalPlayers); Such loops check an expression after executing the code between curly braces, which means that code in the loop will be executed at least once.

In class Fish, currentDepth is a member variable. These variables are “alive” until the instance of the object Fish exists in memory, that’s why they are also called instance variables. println() is using the class variable out that was declared in the class System. Wait a minute! Can we even use a member variable from the class System if we have not created an instance of this class? Yes we can, if this variable was declared with a keyword static. If declaration of a member variable or a method starts with static, you do not have to create an instance of this class to use it.

The logical and is represented by one or two ampersands (&&) and the whole expression is true if every part of it is true. For example, charge the sales tax only if the state is New York and the price is more than $110. equals("New York") & price >110) If you use double ampersand and the first expression is false, the second one won’t even be checked, because the entire expression will be false anyway. With the single ampersand both expressions will be evaluated. The logical not is represented by the exclamation point, and it changes expression to the opposite meaning.

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