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Arithmetic
expressions are simple, but watch out
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for subtle type
conversions. The shorthand
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notation may
save you a lot of typing.
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Comparison
takes two numbers and produces a
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logical result.
Comparisons are usually found
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controlling if statements
or loops.
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Logical
connectors allow several comparisons to
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be combined into
a single test. Lazy evaluation
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can improve the
efficiency of the program by
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reducing the
amount of calculation required.
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