If "from-condition" clause is not used, boolean variable <var> is either assigned value <boolean> with "=" clause, or it is assigned "false" if equal clause ("=") is omitted.
If "process-scope" clause is used, then boolean is of process scope, meaning its value will persist from one request to another for the life of the process.
With "from-condition" clause
If "from-condition" clause is not used, then <condition> is evaluated, and if true, then "true" value is assigned to <var>, otherwise "false" is assigned. See if-true for more on <condition>.
Examples
Assign "true" value to boolean variable "my_bool":