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Returns the width of the interval of Var.
- A variable or a number
- Width of the interval
Returns the width (Hi - Lo) of the interval of Var. If Var has not been
declared before, it will be turned into an unrestricted real variable.
If Var is a ground number, the width will be calculated appropriately
based on its type.
Modes and Determinism
get_median / 2, get_bounds / 3