Java Reference
In-Depth Information
Programs, Data, Variables, and
Calculation
In this chapter we will look at the entities in Java that are not objects - numbers and characters. This
will give you all the elements of the language you need to perform numerical calculations, and we will
apply these in a few working examples.
By the end of this chapter you will have learnt:
How to declare and define variables of the basic integer and floating point types
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How to write an assignment statement
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How integer and floating point expressions are evaluated
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How to output data from a console program
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How mixed integer and floating point expressions are evaluated
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What casting is and when you must use it
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What
boolean
variables are
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What determines the sequence in which operators in an expression are executed
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How to include comments in your programs
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