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vs_size(+VS, -N)
Get the size of a varset
- VS
- A varset
- N
- An integer (output)
Description
	Get the size (number of elements) of a varset.
    
Modes and Determinism
Examples
    ?- Vars=[A,B,C], vs_create(Vars, VS), vs_size(VS, N).
    VS = ...
    N = 3
    Yes (0.00s cpu)
    
See Also
vs_create / 2, vs_element / 3