Computing in Libretto (3 of 5). Local Variables

All variables in Libretto are local and inaccessible from the global context. The types of Libretto variables are:

1. Block variables
2. Path variables
3. Parameter variables.

The range of local variables is a block or a path, in which they are defined. Similar to fields, local variables can be of two types – mutable (marked by the keyword var) and immutable (marked by fix).