In programming, which data type is commonly used for true/false logic?

• A. Boolean
• B. Integer
• C. String
• D. Floating point

Answer: (A)

Truth values are represented by the boolean type. A boolean variable is designed to hold either true or false, and these values are what decision-making constructs rely on—if statements, loops, and logical operators work directly with booleans to control flow and evaluate conditions. Using a boolean makes code clear and correct because the value’s purpose is explicitly a truth value, not numeric data or text. Other data types encode different kinds of information: integers are whole numbers, strings are sequences of characters, and floating point numbers have fractional parts. While some languages use truthiness rules where nonzero numbers or non-empty strings evaluate as true, those are language-specific conventions, not the explicit, typed representation of a logical value. So the standard data type for true/false logic is boolean, since it cleanly models truth values and integrates naturally with conditionals and boolean operations.