How do I declare a set of real values for variables in Eclipse Prolog



How to declaring a variable set of real values in Eclipse
Hi,
I am new to using Eclipse. If anyone could give me some pointers or
show how I can declare a set real values for a variables?
Eg.

[X1] :: 0.1,0.5,0.6,0.7
[X2]:: 0.3,0.4,0.8,1

Thanks in advance,

Tomas

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