A Boolean variable has exactly two possible values: true and false, often also written as 1 and 0 in logic or computer science.

Quick Scoop

  • In standard programming languages and mathematical logic, a Boolean type is defined to represent truth values only, so it can store just two distinct values: true or false.
  • Even though some languages may internally use more than two bit patterns to represent these values, only two are considered valid, distinct Boolean values at the language level.
  • When you see a multiple‑choice question asking “how many possible values are there for a Boolean variable?”, the intended correct answer is 2.

In short: a Boolean variable is a two-valued truth container—nothing more exotic is expected in typical exam or interview contexts.

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