Rtrue

rtrue is a predefined constant used in the Inform 6 language and its related runtimes to represent the boolean value true in certain contexts, most notably as a return value from rule routines. It is paired with rfalse, which represents false. In traditional Inform 6 programming, rules and tests can return rtrue to indicate that an action was handled or the condition succeeded, and rfalse to indicate the opposite. The two constants are used to communicate outcomes within the game's rule-processing system and map to the underlying numeric values used by the virtual machine (typically 1 for true and 0 for false).

The name rtrue reflects its role in rule-based flow control. When a rule or test function returns rtrue, the action processing may continue or proceed to the next step, whereas returning rfalse signals that the action should fail or that alternatives should be considered. This convention helps distinguish high-level decision outcomes from ordinary boolean expressions and keeps rule code readable in the Inform 6 style.

In practice, rtrue and rfalse are most often encountered in library code and examples from classic Inform 6 material. They remain part of the language for compatibility with existing codebases, even as some modern workflows prefer direct boolean literals or integer 1/0 representations. While not universally required in newer tooling, understanding rtrue aids reading and maintaining older Inform 6 sources and the rule-based patterns they use.

See also: rfalse, boolean values, Inform 6, rule routines.