Types/bool: Difference between revisions
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(Expanded, crosslinked to wiki article on booleans. Removed from stub category (not much more info to add)) |
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A variable type which can have one of two values: | A variable type which can have one of two values: true or false. Care must be observed with the concepts of "truthy" and "falsey": different types will act like true in a boolean context, and nil will act like false, but they are not equal. Especially significant: "true" and "false" are truthy strings, and are not true and false. | ||
Used in Boolean algebra, which is the foundation of digital logic and processing. | Used in Boolean algebra, which is the foundation of digital logic and processing. | ||
Wikipedia has a comprehensive article on [http://en.wikipedia.org/wiki/Boolean Booleans] | Wikipedia has a comprehensive article on [http://en.wikipedia.org/wiki/Boolean Booleans] | ||
Revision as of 20:20, 28 December 2021
A variable type which can have one of two values: true or false. Care must be observed with the concepts of "truthy" and "falsey": different types will act like true in a boolean context, and nil will act like false, but they are not equal. Especially significant: "true" and "false" are truthy strings, and are not true and false.
Used in Boolean algebra, which is the foundation of digital logic and processing.
Wikipedia has a comprehensive article on Booleans