Use parentheses to create your own order of operations. in Java

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Use parentheses to create your own order of operations.
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Some Commonly Used Operators
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Here are some operators that you re likely to see. This is just a small sample of the operators available to you in ActionScript 3.0. Some other operators are more speci c to certain types and are covered in their appropriate chapters.
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Assignment (=)
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Undoubtedly the most important operator, the assignment operator sets the value of the variable on the left side to the expression on the right side. The left side must be a single valid variable or property; you can t have expressions on the left side to dynamically choose what variable is being assigned to. The right side can be any expression that ActionScript 3.0 can evaluate.
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Arithmetic (+, , *, /)
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These should need no explanation, perhaps except that multiplication is written as a * instead of , and division is written as / instead of . Trust me this way is much easier to type.
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2: ActionScript 3.0 Language Basics
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Modulo (%)
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The modulo operator returns the remainder after a division operation. It divides the rst number by the second and returns the leftover portion only.
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0 % 1 % 2 % 3 % 4 % 5 % 6 % ... 3 3 3 3 3 3 3 // // // // // // // 0 1 2 0 1 2 0
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Increment (++) and Decrement ( )
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These operators add or subtract 1 from the number they re used on. These are unary operators, so they require only one argument:
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var x:Number = 5; //x=5 x++; //x=6 x--; //x=5 ++x; //x=6
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When the increment or decrement operator is placed before the operand, ActionScript processes the operation with a higher precedence.
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var x:Number = 5; trace(x++); //prints 5, then increments x to 6 trace(++x); //increments x to 7, then prints 7
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Compound Assignment Operators (+=, -=, *=, /=, and %=)
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The compound assignment operators provide a shorthand solution to performing arithmetic on a variable and storing the result in the same variable. For instance, += adds the left-hand variable to the right-hand expression, storing the result in the left-hand variable.
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x += 1;
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x = x + 1;
The following code shows more examples of these compound operators.
var x:Number = 0; x x x x x += -= *= /= %= 5; 3; 3; 2; 3; // // // // // x x x x x = = = = = 5 2 6 3 0
Part I: ActionScript 3.0 Language Basics
Comma Operator (,)
The comma operator joins several subexpressions. The whole expression takes the value of the last subexpression in the list. You don t see this one used frequently, but it can be helpful.
var a:Number = 50; var b:Number = (a *= 2, 50 + 50); trace(a, b); //100 100
This is a tricky one. The snippet demonstrates that even though only the last expression separated by commas is returned, all of them are evaluated. The variable b is assigned 100 after evaluating the second subexpression 50+50, but you can tell by the fact that a becomes 100 that a*=2 was evaluated, too. I ll introduce more of the operators in subsequent parts of this chapter. A comprehensive chart of all operators and their uses can be found in your trusty AS3LR.
Note
As mentioned in the Introduction, the ActionScript 3.0 Language Reference (AS3LR) or ActionScript 3.0 Language and Component Reference (AS3LCR) is the de nitive source of information on all parts of the ActionScript 3.0 language. This document is available free online and is bundled with all of Adobe s ActionScript 3.0 development tools. If you d like to see a full list of all the operators, refer to the Language Elements section of AS3LR. Find it at http://bit.ly/as3lr.
Making Logical Choices with Conditionals
What good would it be if your programs and functions executed the same way every time you ran them Essentially, the element of choice over how to act under different circumstances would be lost. That s where conditionals, or decision-making points in your code, come into play. Conditionals, such as the if statement, enable you to evaluate the truth of a logical expression and react differently in different scenarios. All conditional statements deal with Boolean values. Booleans are simple logical values that can only be one of the values true or false. Any logical expression can be evaluated down to either true or false and used with conditional operators.