6.8 Boolean Operators

THE OPERATORS

DESCRIPTION

English Name: syntax

Explanation

not: ! boolean

The not operator returns true if boolean is false and returns false if boolean is true.

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and: boolean_1 && boolean_2

The and operator returns true if boolean_1 and boolean_2 are both true, otherwise it returns false.

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or: boolean_1 || boolean_2

The or operator returns true if either boolean_1 or boolean_2 is true, otherwise returns false

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equals: expression_1 == expression_2

The equals operator returns true if expression_1 and expression_2 are identical, otherwise false. For example, if the expressions are integers, you will get a true result if they are the same integer. For objects, you will get a true result if and only if expression_1 and expression_2 are the exact same object.

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not equals: expression_1 != expression_2

The not equals operator returns true if expression_1 and expression_2 are not identical, otherwise false. This is the same as ! ( expression_1 != expression_2 ) .

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less than: value_1 < value_2

The less than operator returns true if the numeric value_1 is less than value_2, false otherwise.

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greater than: value_1 > value_2

The greater than operator returns true if the numeric value_1 is greater than value_2, false otherwise.

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less than or equals: value_1 <= value_2

The less than or equals operator returns true if the numeric value_1 is less than or equals value_2,

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greater than or equals: value_1 >= value_2

The greater than or equals operator returns true if the numeric value_1 is greater than or equals value_2,

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6.9 Mathematics in Java

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David Maxwell, who is still writing this, would like to hear your comments and suggestions.