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Returns the width of the interval of Var.
- A domain variable or an integer
- Width of the interval
Returns the width (Hi - Lo) of the interval of Var. If Var is an integer,
0 will be returned as the width. If Var is free, then 1.0Inf is
returned as the width, but Var is not turned into a domain variable.
Modes and Determinism
get_median / 2, get_bounds / 3