FalseClass

FalseClass is a core class in the Ruby programming language that represents the boolean value false. In Ruby, booleans are objects: true is an instance of TrueClass and false is an instance of FalseClass. The value false is used to indicate negation, failure, or the absence of a true condition within program logic.

FalseClass inherits from Object, and the false value is a singleton object rather than a construct that can be instantiated multiple times. There is no public constructor to create new FalseClass objects; the language provides exactly one false value used throughout a program.

In terms of behavior, false participates in boolean expressions and control flow as a falsey value. Ruby treats only false and nil as false in conditionals; all other objects, including 0, empty strings, and empty arrays, are considered true. Methods on FalseClass are those available to it as an Object subclass, and its string representation is typically "false" when converted with to_s.

From a programming perspective, you can inspect the type of false at runtime (false.class returns FalseClass) and compare it with other values using standard comparison operators. Ruby's boolean operators (&, |, and, or) can be used with false in expressions that combine multiple boolean values.

See also: TrueClass, NilClass, Ruby.