The false variable is a read-only variable with a predefined value of 0.
Many program statements rely upon conditional tests to determine what program statement should be executed next. The if statement is an example of this. Conditional tests evaluate to either a true value or a false value. In the Security Policy Scripting Language, a true value is represented by any positive, non-zero integer, but is usually represented by the integer value 1. A 0 represents false.
Because true and false values are used so frequently within security policy files, the variable true may be used in place of a numeric value 1 and the variable false may be used in place of a 0 value when evaluating a conditional expression or initializing a variable.
0. Constant, cannot be changed.
For more information, please see true.