PPT Slide

Member

member2 ( X , [ X | _ ] ) .

member2 ( X , [ _ | Rest ] ) :- member 2( X, Rest ) .

| ? - member ( cheese , [ milk , bread , cheese , eggs ] ) .

yes

| ? - member ( cheese , [ milk , [ bread , cheese ] , eggs ] ).

no

Length

length1( [ ] , 0 ) .

length1( [ _ | Rest ] , L ) : -

length1( Rest , L 1 ) ,

L is L1+ 1 .

| ? - length1 ( [ a , b , c , d ] , X ) .

P.29

LIST OPERATIONS IN PROLOG

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