What is a boolean?

Answer 1

A Boolean is a variable that can hold the value true or false. In most implementations, true is the all-ones bit pattern while false is the all-zeroes bit pattern. As a signed integer in twos-complement notation these patters represent -1 and 0 respectively. However, numeric values can and often do implicitly convert to a Boolean such that non-zero values are always true while zero is always false. For typical container objects (including strings), an empty container implicitly converts to false while a non-empty container implicitly converts to true.

Answer 2

Boolean is an adjective, not a noun so there is no such thing as a boolean. Also, it is named after a person - George Boole - so the word should be Boolean.

Boolean algebra refers to the calculus of truth values.

Answer 3

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Answer 4

one with two answers yes and no, 0 and 1