RosettaCodeData/Task/Collections/Setl4/collections-1.setl4

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set = new('set 5 10 15 20 25 25')
add(set,30)
show(set)
show.eval('member(set,5)')
show.eval('member(set,6)')
show.eval("exists(set,'eq(this,10)')")
show.eval("forall(set,'eq(this,40)')")